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Full vulnerability report · 2026
CVE-2026-20931High confidence

Windows Telephony Service Elevation of Privilege Vulnerability

Microsoft · Windows 10 Version 1607

8.0HighCVSS 3.1
Recommended action
Within 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
R
Operational reassessment

Published severity in operational context

Open reassessment dashboard →
Published severityHighOperational priority:High, unchanged from published severity.unchanged

Evidence used

  • No CISA KEV confirmation is currently recorded.
  • EPSS is 0.86% for the current model date.

Compensating controls

  • Validate the affected product branch and deploy the verified fixed release.
  • Restrict local access and enforce least privilege on affected hosts.
  • Monitor vendor guidance and exploitation sources for a material change.

Verification

  1. Confirm that the asset runs Microsoft Windows 10 Version 1607 and falls inside the recorded affected range.
  2. Verify the installed build against the product-specific fixed version after deployment.
  3. Validate exposure, authentication requirements and compensating controls in the actual environment.
  4. Reopen this reassessment when CVSS, KEV, EPSS, exploit evidence or remediation changes.
Mitigation target: Within 30 daysRemediation target: Within 180 days

This automated reassessment organises public evidence. It does not know asset exposure, business impact or control effectiveness and does not replace CVSS or a human risk decision.

Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Choose official national sources for this report. Each advisory shows its original language. Your selection is remembered on this device and included in shared links.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2026-2123

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

External control of file name or path in Windows Telephony Service allows an authorized attacker to elevate privileges over an adjacent network.

What

External control of file name or path in Windows Telephony Service allows an authorized attacker to elevate privileges over an adjacent network.

Why

The product allows user input to control or influence paths or file names that are used in filesystem operations.

How

An attacker operating through an adjacent network may attempt exploitation with low privileges. If successful, the issue may gain additional privileges.

What

External control of file name or path in Windows Telephony Service allows an authorized attacker to elevate privileges over an adjacent network.

Why

The product allows user input to control or influence paths or file names that are used in filesystem operations.

How

An attacker operating through an adjacent network may attempt exploitation with low privileges. If successful, the issue may gain additional privileges.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path
an adjacent network → External Control of File Name or Path → gain additional privileges
Attack surface
Adjacent
Privileges required
Low: a basic authenticated account is required
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-73 ↗

CWE-73: External Control of File Name or Path. The product allows user input to control or influence paths or file names that are used in filesystem operations.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVAdjacentAttack vector: The attacker must be on an adjacent or logically close network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRLowPrivileges required: The attacker needs basic user-level privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CHighConfidentiality impact: A successful attack can cause a major loss.IHighIntegrity impact: A successful attack can cause a major loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
Privilege escalationCWE-73
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-2026-0083Microsoft Windows : Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in verschiedenen Versionen von Microsoft Windows und Microsoft Windows Server ausnutzen,, um erweiterte Privilegien, einschließlich Benutzer- und Administratorrechten, zu erlangen, beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, einen Denial-of-Service-Zustand zu verursachen und Daten zu manipulieren.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20260114Security Bulletin 14 Jan 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 14 Jan 2026, published on 14 January 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0044Multiples vulnérabilités dans Microsoft Windows

6-20920 du 13 janvier 2026 Bulletin de sécurité Microsoft Windows CVE-2026-20921 du 13 janvier 2026 Bulletin de sécurité Microsoft Windows CVE-2026-20922 du 13 janvier 2026 Bulletin de sécurité Microsoft Windows CVE-2026-20923 du 13 janvier 2026 Bulletin de sécurité Microsoft Windows CVE-2026-20924 du 13 janvier 2026 Bulletin de sécurité Microsoft Windows CVE-2026-20925 du 13 janvier 2026 Bulletin de sécurité Microsoft Windows CVE-2026-20926 du 13 janvier 2026 Bulletin de sécurité Microsoft Windows CVE-2026-20927 du 13 janvier 2026 Bulletin de sécurité Microsoft Windows CVE-2026-20929 du 13 janvier 2026 Bulletin de sécurité Microsoft Windows CVE-2026-20931 du 13 janvier 2026 Bulletin de sécurité Microsoft Windows CVE-2026-20932 du 13 janvier 2026 Bulletin de sécurité Microsoft Windows CVE-2026-20934 du 13 janvier 2026 Bulletin de sécurité Microsoft Windows CVE-2026-20935 du 13 janvier 2026 Bulletin de sécurité Microsoft Windows CVE-2026-20936 du 13 janvier 2026 Bulletin de sécurité Microsoft Windows CVE-2026-20937 du 13 janvier 2026 Bulletin de sécurité Microsoft Windows CVE-2026-20938 du 13 janvier 2026 Bulletin de sécurité Microsoft Windows CVE-2026-20939 du 13 janvier 2026 Bulletin de sécurité Microsoft Windows CVE-2026-20940 du 13 janvier 2026 Bulletin de sécurité Microsoft Windows CVE-202

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-001554マイクロソフトのMicrosoft Windows 10 1607等の複数製品におけるファイル名やパス名の外部制御に関する脆弱性

Windows Telephony Serviceにおけるファイル名またはパスの外部制御により、認証された攻撃者が隣接ネットワーク上で特権を昇格させることが可能です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-004359日立ディスクアレイシステムにおけるSVP 脆弱性対策について　(2026年1月分)

Microsoft製品に対して、以下に示す脆弱性が公開されました。 [脆弱性の内容] MITRE: CVE-2023-31096 Windows Agere ソフト モデム ドライバーの特権昇格の脆弱性 (CVE-2023-31096) Windows Motorola ソフト モデム ドライバーの特権昇格の脆弱性 (CVE-2024-55414) Windows Hello 改ざんの脆弱性 (CVE-2026-20804) デスクトップ ウィンドウ マネージャーの情報漏えいの脆弱性 (CVE-2026-20805) Windows カーネル メモリの特権昇格の脆弱性 (CVE-2026-20809) WinSock 用 Windows Ancillary Function Driver の特権の昇格の脆弱性 (CVE-2026-20810) LDAP 改ざんの脆弱性 (CVE-2026-20812) DirectX グラフィック カーネルの特権の昇格の脆弱性 (CVE-2026-20814) Windows インストーラーの特権の昇格の脆弱性 (CVE-2026-20816) Windows エラー報告サービスの特権の昇格の脆弱性 (CVE-2026-20817) Windows 共通ログ ファイル システム ドライバーの特権の昇格の脆弱性 (CVE-2026-20820) リモート プロシージャ コールの情報漏えいの脆弱性 (CVE-2026-20821) Windows Graphics コンポーネントの特権の昇格の脆弱性 (CVE-2026-20822) Windows エクスプローラーの情報漏えいの脆弱性 (CVE-2026-20823) Windows リモート アシスタンスのセキュリティ機能バイパスの脆弱性 (CVE-2026-20824) Windows Hyper-V の情報漏えいの脆弱性 (CVE-2026-20825) タブレット Windows ユーザー インターフェイス (TWINUI) サブシステムの情報漏えいの脆弱性 (CVE-2026-20826) タブレット Windows ユーザー インターフェイス (TWINUI) サブシステムの情報漏えいの脆弱性 (CVE-2026-20827) Windows rndismp6.sys の情報漏えいの脆弱性 (CVE-2026-20828) TPM Trustlet の情報漏えいの脆弱性 (CVE-2026-20829) WinSock 用 Windows Ancillary Function Driver の特権の昇格の脆弱性 (CVE-2026-20831) Windows リモート プロシージャ コール インターフェイス定義言語 (IDL) の特権昇格の脆弱性 (CVE-2026-20832) Windows のなりすましの脆弱性 (CVE-2026-20834) DirectX グラフィック カーネルの特権の昇格の脆弱性 (CVE-2026-20836) Windows Media のリモートでコードが実行される脆弱性 (CVE-2026-20837) Windows クライアント側のキャッシュ (CSC) サービスの情報漏えいの脆弱性 (CVE-2026-20839) Windows NTFS のリモートでコードが実行される脆弱性 (CVE-2026-20840) Microsoft DWM Core ライブラリの特権の昇格の脆弱性 (CVE-2026-20842) Windows ルーティングとリモート アクセス サービス (RRAS) の特権昇格の脆弱性 (CVE-2026-20843) Windows クリップボード サーバーの特権昇格の脆弱性 (CVE-2026-20844) Microsoft Windows ファイル エクスプローラーのスプーフィングの脆弱性 (CVE-2026-20847) Windows SMB Server Elevation of Privilege Vulnerability (CVE-2026-20848) Windows Kerberos の特権の昇格の脆弱性 (CVE-2026-20849) Windows Hello 改ざんの脆弱性 (CVE-2026-20852) Windows WalletService の特権の昇格の脆弱性 (CVE-2026-20853) Windows Server Update Service (WSUS) のリモートでコードが実行される脆弱性 (CVE-2026-20856) Windows Cloud Files Mini Filter ドライバーの特権の昇格の脆弱性 (CVE-2026-20857) Windows Management サービスの特権昇格の脆弱性 (CVE-2026-20858) WinSock 用 Windows Ancillary Function Driver の特権の昇格の脆弱性 (CVE-2026-20860) Windows Management サービスの特権昇格の脆弱性 (CVE-2026-20861) Windows Management サービスの情報漏えいの脆弱性 (CVE-2026-20862) Windows Connected Devices Platform Service に存在する特権昇格の脆弱性 (CVE-2026-20864) Windows Management サービスの特権昇格の脆弱性 (CVE-2026-20865) Windows Management サービスの特権昇格の脆弱性 (CVE-2026-20866) Windows Management サービスの特権昇格の脆弱性 (CVE-2026-20867) Windows ルーティングとリモート アクセス サービス (RRAS) のリモートでコードが実行される脆弱性 (CVE-2026-20868) Windows ローカル セッション マネージャー (LSM) の特権の昇格の脆弱性 (CVE-2026-20869) デスクトップ ウィンドウ マネージャーの特権の昇格の脆弱性 (CVE-2026-20871) NTLM ハッシュ開示スプーフィングの脆弱性 (CVE-2026-20872) Windows Management サービスの特権昇格の脆弱性 (CVE-2026-20873) Windows Management サービスの特権昇格の脆弱性 (CVE-2026-20874) Windows ローカル セキュリティ機関サブシステム サービス (LSASS) のサービス拒否の脆弱性 (CVE-2026-20875) Windows Management サービスの特権昇格の脆弱性 (CVE-2026-20877) Windows Management サービスの特権昇格の脆弱性 (CVE-2026-20918) Windows SMB Server Elevation of Privilege Vulnerability (CVE-2026-20919) Windows SMB Server Elevation of Privilege Vulnerability (CVE-2026-20921) Windows NTFS のリモートでコードが実行される脆弱性 (CVE-2026-20922) Windows Management サービスの特権昇格の脆弱性 (CVE-2026-20923) Windows Management サービスの特権昇格の脆弱性 (CVE-2026-20924) NTLM ハッシュ開示スプーフィングの脆弱性 (CVE-2026-20925) Windows SMB Server Elevation of Privilege Vulnerability (CVE-2026-20926) Windows SMB サーバーのサービス拒否の脆弱性 (CVE-2026-20927) Windows HTTP.sys の特権の昇格の脆弱性 (CVE-2026-20929) Windows テレフォニー サービスの特権昇格の脆弱性 (CVE-2026-20931) Windows エクスプローラーの情報漏えいの脆弱性 (CVE-2026-20932) Windows SMB Server Elevation of Privilege Vulnerability (CVE-2026-20934) Windows NDIS の情報漏えいの脆弱性 (CVE-2026-20936) Windows エクスプローラーの情報漏えいの脆弱性 (CVE-2026-20937) Windows エクスプローラーの情報漏えいの脆弱性 (CVE-2026-20939) Windows Cloud Files Mini Filter ドライバーの特権の昇格の脆弱性 (CVE-2026-20940) Dynamic Root of Trust for Measurement (DRTM) の情報漏えいの脆弱性 (CVE-2026-20962) セキュア ブート証明書の有効期限切れによるセキュリティ機能バイパスの脆弱性 (CVE-2026-21265) SVPは直接ストレージ機能には係わりませんので、万一攻撃者から攻撃された場合であってもストレージとしてのデータの内容およびRead/Write機能に支障はありません。また日立ディスクアレイシステムに蓄積されているデータを読み取られることもありません。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-6667MS 1월 보안 위협에 따른 정기 보안 업데이트 권고

파일 미니 필터 드라이버 권한 상승 취약성 | | Windows File Explorer | CVE-2026-20939 | Windows 파일 탐색기 정보 공개 취약성 | | Windows Virtualization-Based Security (VBS) Enclave | CVE-2026-20938 | Windows VBS(가상화 기반 보안) 엔클레이브 권한 상승 취약성 | | Windows File Explorer | CVE-2026-20937 | Windows 파일 탐색기 정보 공개 취약성 | | Windows NDIS | CVE-2026-20936 | Windows NDIS 정보 유출 취약성 | | Windows Virtualization-Based Security (VBS) Enclave | CVE-2026-20935 | Windows 가상화 기반 보안(VBS) 보안 기능 바이패스 취약성 | | Windows SMB Server | CVE-2026-20934 | Windows SMB Server Elevation of Privilege Vulnerability | | Windows File Explorer | CVE-2026-20932 | Windows 파일 탐색기 정보 공개 취약성 | | Windows Telephony Service | CVE-2026-20931 | Windows 전화 통신 서비스 권한 상승 취약성 | | Windows HTTP.sys | CVE-2026-20929 | Windows HTTP.sys 권한 상승 취약성 | | Windows SMB Server | CVE-2026-20927 | Windows SMB 서버 서비스 거부 취약성 | | Windows SMB Server | CVE-2026-20926 | Windows SMB Server Elevation of Privilege Vulnerability | | Windows NTLM | CVE-2026-20925 | NTLM 해시 공개 스푸핑 취약성 | | Windows Management Services | CVE-2026-20924 | Windows 관리 서비스 권한 상승 취약성 | | Windows Management Services | CVE-2026-20923 | Windows 관리 서비스 권한 상승 취약성 | | Windows NTFS | CVE-2026-20922 | Windows NTFS 원격 코드 실행 취약성 | | Windows SMB Server | CVE-2026-20921 | Windows SMB Server Elevation of Privilege Vulnerability | | Windows Win32K

Official advisory ↗
NCSC-NL · Dutch · NCSC-2026-0007Kwetsbaarheden verholpen in Microsoft Windows

Een kwaadwillende kan de kwetsbaarheden misbruiken om aanvallen uit te voeren die kunnen leiden tot de volgende categoriën schade: - Denial-of-Service (DoS) - Manipulatie van gegevens - Toegang tot gevoelige gegevens - Uitvoeren van willekeurige code (gebruikersrechten) - Uitvoeren van willekeurige code (root/admin) - Verkrijgen van verhoogde rechten - Omzeilen van een beveiligingsmaatregel - Spoofing Van de kwetsbaarheid met kenmerk CVE-2026-21265 meldt Microsoft informatie te hebben dat deze publiekelijk besproken wordt op fora. Een kwaadwillende kan de kwetsbaarheid misbruiken om Secure Boot te omzeilen. Misbruik is echter niet eenvoudig, vereist voorafgaande verhoogde rechten en een diepgaande kennis van het te compromitteren systeem. Grootschalig misbruik is hiermee zeer onwaarschijnlijk. Van de kwetsbaarheid met kenmerk CVE-2026-20805 meldt Microsoft dat deze als zeroday-kwetsbaarheid is misbruikt. Misbruik vereist lokale toegang en voorafgaande gebruikersauthenticatie. Verdere informatie is niet bekend gesteld. Grootschalig misbruik is niet waarschijnlijk. De kwetsbaarheid met kenmerk CVE-2023-31096 is een oudere kwetsbaarheid in Broadcom modem drivers, zoals gebruikt in de (verouderde) Agere modems. Hiervan is al langer Proof-of-Concept-code bekend, maar grootschalig misbruik heeft voor zover bekend nog niet plaatsgevonden. Microsoft heeft in deze update de drivers verwijderd. Een kwaadwillende kan deze kwetsbaarheid met kenmerk CVE-2026-20817 misbruiken doordat Windows Error Reporting onvoldoende controle uitvoert op rechten en privileges, waardoor een geautoriseerde aanvaller lokaal zijn rechten kan verhogen. Voor deze kwetsbaarheid is Proof-of-Concept-Code (PoC) verschenen. Het NCSC verwacht een toename in scan- en misbruikverkeer, waardoor de kans op misbruik kan toenemen. ``` Windows Remote Assistance: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20824 | 5.50 | Omzeilen van beveiligingsmaatregel | |----------------|------|-------------------------------------| Capability Access Management Service (camsvc): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20815 | 7.00 | Verkrijgen van verhoogde rechten | | CVE-2026-20835 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2026-20851 | 6.20 | Toegang tot gevoelige gegevens | | CVE-2026-20830 | 7.00 | Verkrijgen van verhoogde rechten | | CVE-2026-21221 | 7.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Media: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20837 | 7.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Local Session Manager (LSM): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20869 | 7.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows NDIS: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20936 | 4.30 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Windows Management Services: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20858 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-20865 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-20877 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-20918 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-20923 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-20924 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-20861 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-20862 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2026-20866 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-20867 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-20873 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-20874 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Client-Side Caching (CSC) Service: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20839 | 5.50 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Host Process for Windows Tasks: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20941 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Graphics Kernel: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20814 | 7.00 | Verkrijgen van verhoogde rechten | | CVE-2026-20836 | 7.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows NTLM: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20925 | 6.50 | Voordoen als andere gebruiker | | CVE-2026-20872 | 6.50 | Voordoen als andere gebruiker | |----------------|------|-------------------------------------| Windows Ancillary Function Driver for WinSock: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20810 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-20831 | 7.00 | Verkrijgen van verhoogde rechten | | CVE-2026-20860 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Printer Association Object: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20808 | 7.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Local Security Authority Subsystem Service (LSASS): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20875 | 7.50 | Denial-of-Service | | CVE-2026-20854 | 7.50 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Kernel: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20818 | 6.20 | Toegang tot gevoelige gegevens | | CVE-2026-20838 | 5.50 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Windows Secure Boot: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-21265 | 6.40 | Omzeilen van beveiligingsmaatregel | |----------------|------|-------------------------------------| Windows Error Reporting: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20817 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Kernel-Mode Drivers: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20859 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Remote Procedure Call: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20821 | 6.20 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Dynamic Root of Trust for Measurement (DRTM): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20962 | 4.40 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Windows Telephony Service: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20931 | 8.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Installer: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20816 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Microsoft Graphics Component: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20822 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Hello: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20804 | 7.70 | | | CVE-2026-20852 | 7.70 | | |----------------|------|-------------------------------------| Windows WalletService: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20853 | 7.40 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Desktop Window Manager: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20805 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2026-20871 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Connected Devices Platform Service (Cdpsvc): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20864 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Internet Connection Sharing (ICS): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20828 | 4.60 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Windows Kerberos: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20833 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2026-20849 | 7.50 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Motorola Soft Modem Driver: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2024-55414 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Routing and Remote Access Service (RRAS): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20843 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-20868 | 8.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows NTFS: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20840 | 7.80 | Uitvoeren van willekeurige code | | CVE-2026-20922 | 7.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows DWM: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20842 | 7.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Hyper-V: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20825 | 4.40 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Windows Kernel Memory: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20809 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Server Update Service: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20856 | 8.10 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows File Explorer: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20823 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2026-20932 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2026-20937 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2026-20939 | 5.50 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Windows TPM: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20829 | 5.50 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Windows Clipboard Server: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20844 | 7.40 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Remote Procedure Call Interface Definition Language (IDL): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20832 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Common Log File System Driver: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20820 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Cloud Files Mini Filter Driver: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20857 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-20940 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Win32K - ICOMP: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20811 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-20920 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-20863 | 7.00 | Verkrijgen van verhoogde rechten | | CVE-2026-20870 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Virtualization-Based Security (VBS) Enclave: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20819 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2026-20876 | 6.70 | Verkrijgen van verhoogde rechten | | CVE-2026-20938 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-20935 | 6.20 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Agere Windows Modem Driver: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2023-31096 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows LDAP - Lightweight Directory Access Protocol: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20812 | 6.50 | | |----------------|------|-------------------------------------| Windows HTTP.sys: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20929 | 7.50 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Deployment Services: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-0386 | 7.50 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Tablet Windows User Interface (TWINUI) Subsystem: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20826 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-20827 | 5.50 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Windows SMB Server: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20919 | 7.50 | Verkrijgen van verhoogde rechten | | CVE-2026-20921 | 7.50 | Verkrijgen van verhoogde rechten | | CVE-2026-20926 | 7.50 | Verkrijgen van verhoogde rechten | | CVE-2026-20927 | 5.30 | Denial-of-Service | | CVE-2026-20934 | 7.50 | Verkrijgen van verhoogde rechten | | CVE-2026-20848 | 7.50 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Shell: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-20834 | 4.60 | Voordoen als andere gebruiker | | CVE-2026-20847 | 6.50 | Voordoen als andere gebruiker | |----------------|------|-------------------------------------| ```

Official advisory ↗
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Review the linked authoritative reference and apply the recorded fixed release appropriate to the affected product branch.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 13 Jan 2026 · Last source change 30 Jul 2026, 20:47 UTC · CWE-73 · External Control of File Name or Path

CVE recordCVE.org · 5.2
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2026-2123
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceOther authority
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
ENISA EUVD · EUVD-2026-2123↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2026-20931 · cve.blacktree.nl