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Full vulnerability report · 2026
CVE-2026-40408High confidence

Windows WAN ARP Driver Elevation of Privilege Vulnerability

Microsoft · Windows 10 Version 1607

7.8HighCVSS 3.1
Recommended action
Within 7 days

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

Patch available
Optional official sources

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

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

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-2026-29668

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

Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally.

What

Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through local access may attempt exploitation with low privileges. If successful, the issue may gain additional privileges.

What

Use after free in Windows Kernel-Mode Drivers allows an authorized attacker to elevate privileges locally.

Why

The program can continue using memory after it has been released, producing unsafe and attacker-influenceable behaviour.

How

An attacker operating through local access 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
local access → Use After Free → gain additional privileges
Attack surface
Local
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-416 ↗

CWE-416: Use After Free. The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory belongs to the code that operates on the new pointer.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:L/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.

AVLocalAttack vector: The attacker needs local access to the vulnerable system.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
The issue can support a local privilege or sandbox boundary transition; normal system utilities may then be available in the gained context.
Privilege escalationCWE-416
A

Official authority intelligence

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

BSI · German · WID-SEC-2026-1489Microsoft Windows Produkte: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Microsoft Windows Produkten ausnutzen, um beliebigen Programmcode auszuführen, um seine Privilegien zu erhöhen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, und um Sicherheitsvorkehrungen zu umgehen.

Official advisory ↗
CERT-FR · French · CERTFR-2026-AVI-0585Multiples vulnérabilités dans Microsoft Windows

e sécurité Microsoft Windows CVE-2026-40397 du 12 mai 2026 Bulletin de sécurité Microsoft Windows CVE-2026-40398 du 12 mai 2026 Bulletin de sécurité Microsoft Windows CVE-2026-40399 du 12 mai 2026 Bulletin de sécurité Microsoft Windows CVE-2026-40401 du 12 mai 2026 Bulletin de sécurité Microsoft Windows CVE-2026-40402 du 12 mai 2026 Bulletin de sécurité Microsoft Windows CVE-2026-40403 du 12 mai 2026 Bulletin de sécurité Microsoft Windows CVE-2026-40405 du 12 mai 2026 Bulletin de sécurité Microsoft Windows CVE-2026-40406 du 12 mai 2026 Bulletin de sécurité Microsoft Windows CVE-2026-40407 du 12 mai 2026 Bulletin de sécurité Microsoft Windows CVE-2026-40408 du 12 mai 2026 Bulletin de sécurité Microsoft Windows CVE-2026-40410 du 12 mai 2026 Bulletin de sécurité Microsoft Windows CVE-2026-40413 du 12 mai 2026 Bulletin de sécurité Microsoft Windows CVE-2026-40414 du 12 mai 2026 Bulletin de sécurité Microsoft Windows CVE-2026-40415 du 12 mai 2026 Bulletin de sécurité Microsoft Windows CVE-2026-41086 du 12 mai 2026 Bulletin de sécurité Microsoft Windows CVE-2026-41088 du 12 mai 2026 Bulletin de sécurité Microsoft Windows CVE-2026-41089 du 12 mai 2026 Bulletin de sécurité Microsoft Windows CVE-2026-41095 du 12 mai 2026 Bulletin de sécurité Microsoft Windows CVE-2026-41096 du 12 mai 2026 Bulletin de s

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-015968マイクロソフトのMicrosoft Windows 10 1607等の複数製品における解放済みメモリの使用に関する脆弱性

Windowsカーネルモードドライバーに存在するUse after freeの脆弱性により、権限を持つ攻撃者がローカルで権限を昇格させることが可能です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2026-024104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5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] AMD: CVE-2025-54518 CPU OP キャッシュにおけるデータ破損 (CVE-2025-54518) Windows リッチ テキスト エディットの特権昇格の脆弱性 (CVE-2026-21530) Windows ネイティブ WiFi ミニポート ドライバーのリモートでコードが実行される脆弱性 (CVE-2026-32161) Windows リッチ テキスト エディットの特権昇格の脆弱性 (CVE-2026-32170) .NET の特権の昇格の脆弱性 (CVE-2026-32177) Windows フィルタリング プラットフォーム (WFP) のセキュリティ機能のバイパスの脆弱性 (CVE-2026-32209) Windows Event Logging Service の特権の昇格の脆弱性 (CVE-2026-33834) Windows Cloud Files Mini Filter ドライバーの特権の昇格の脆弱性 (CVE-2026-33835) Windows TCP/IP Local の特権昇格の脆弱性 (CVE-2026-33837) Windows メッセージ キュー (MSMQ) の特権昇格の脆弱性 (CVE-2026-33838) Win32k の特権の昇格の脆弱性 (CVE-2026-33839) Windows カーネルの特権の昇格の脆弱性 (CVE-2026-33841) Microsoft Message Queuing (MSMQ) のリモートでコードが実行される脆弱性 (CVE-2026-34329) Win32k の特権の昇格の脆弱性 (CVE-2026-34330) Win32k の特権の昇格の脆弱性 (CVE-2026-34331) Windows Win32k の特権の昇格の脆弱性 (CVE-2026-34333) Windows TCP/IP の特権昇格の脆弱性 (CVE-2026-34334) Windows DWM Core ライブラリの情報漏えいの脆弱性 (CVE-2026-34336) Windows Cloud Files Mini Filter ドライバーの特権の昇格の脆弱性 (CVE-2026-34337) Windows テレフォニー サービスの特権昇格の脆弱性 (CVE-2026-34338) Windows ライトウェイト ディレクトリ アクセス プロトコル (LDAP) のサービス拒否の脆弱性 (CVE-2026-34339) Windows Projected File System の特権の昇格の脆弱性 (CVE-2026-34340) Windows Link-Layer Discovery Protocol (LLDP) の特権昇格の脆弱性 (CVE-2026-34341) Windows 印刷スプーラーの特権の昇格の脆弱性 (CVE-2026-34342) Windows アプリケーション ID (AppID) のサブシステムの特権昇格の脆弱性 (CVE-2026-34343) WinSock 用 Windows Ancillary Function Driver の特権の昇格の脆弱性 (CVE-2026-34344) WinSock 用 Windows Ancillary Function Driver の特権の昇格の脆弱性 (CVE-2026-34345) Windows Win32k の特権の昇格の脆弱性 (CVE-2026-34347) Windows TCP/IP の特権昇格の脆弱性 (CVE-2026-34351) Windows 記憶域スペース コントローラーの特権昇格の脆弱性 (CVE-2026-35415) WinSock 用 Windows Ancillary Function Driver の特権の昇格の脆弱性 (CVE-2026-35416) Windows Win32k の特権の昇格の脆弱性 (CVE-2026-35417) Windows Cloud Files Mini Filter ドライバーの特権の昇格の脆弱性 (CVE-2026-35418) Windows GDI のリモートでコードが実行される脆弱性 (CVE-2026-35421) Windows TCP/IP ドライバーのセキュリティ機能のバイパスの脆弱性 (CVE-2026-35422) Windows 11 Telnet クライアントの情報漏えいの脆弱性 (CVE-2026-35423) インターネット キー交換 (IKE) プロトコルのサービス拒否の脆弱性 (CVE-2026-35424) Microsoft Cryptographic Services の特権の昇格の脆弱性 (CVE-2026-40377) Windows ボリューム マネージャー拡張ドライバーのリモートでコードが実行される脆弱性 (CVE-2026-40380) Windows テレフォニー サービスの特権昇格の脆弱性 (CVE-2026-40382) 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-2026-40397) Windows リモート デスクトップ サービスの特権昇格の脆弱性 (CVE-2026-40398) Windows TCP/IP の特権昇格の脆弱性 (CVE-2026-40399) Windows TCP/IP のサービス拒否の脆弱性 (CVE-2026-40401) Windows グラフィックス コンポーネントのリモートでコードが実行される脆弱性 (CVE-2026-40403) Windows TCP/IP の情報漏えいの脆弱性 (CVE-2026-40406) 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-2026-40407) Windows WAN ARP Driver Elevation of Privilege Vulnerability (CVE-2026-40408) Windows SMB クライアントの特権の昇格の脆弱性 (CVE-2026-40410) Windows TCP/IP のサービス拒否の脆弱性 (CVE-2026-40413) Windows TCP/IP のサービス拒否の脆弱性 (CVE-2026-40414) Windows TCP/IP のリモートでコードが実行される脆弱性 (CVE-2026-40415) WinSock 用 Windows Ancillary Function Driver の特権の昇格の脆弱性 (CVE-2026-41088) セキュア ブートのセキュリティ機能のバイパスの脆弱性 (CVE-2026-41097) Windows テレフォニー サービスの特権昇格の脆弱性 (CVE-2026-42825) 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-6788MS 5월 보안 위협에 따른 정기 보안 업데이트 권고

s TCP/IP Elevation of Privilege Vulnerability | | Windows TCP/IP | CVE-2026-40401 | Windows TCP/IP Denial of Service Vulnerability | | Windows Hyper-V | CVE-2026-40402 | Windows Hyper-V Elevation of Privilege Vulnerability | | Windows Win32K - GRFX | CVE-2026-40403 | Windows Win32K - GRFX Remote Code Execution Vulnerability | | Windows TCP/IP | CVE-2026-40405 | Windows TCP/IP Denial of Service Vulnerability | | Windows TCP/IP | CVE-2026-40406 | Windows TCP/IP Information Disclosure Vulnerability | | Windows 공용 로그 파일 시스템 드라이버 | CVE-2026-40407 | Windows Common Log File System Driver Elevation of Privilege Vulnerability | | Windows 커널 모드 드라이버 | CVE-2026-40408 | Windows Kernel-Mode Driver Elevation of Privilege Vulnerability | | Windows SMB 클라이언트 | CVE-2026-40410 | Windows SMB Client Elevation of Privilege Vulnerability | | Windows TCP/IP | CVE-2026-40413 | Windows TCP/IP Denial of Service Vulnerability | | Windows TCP/IP | CVE-2026-40414 | Windows TCP/IP Denial of Service Vulnerability | | Windows TCP/IP | CVE-2026-40415 | Windows TCP/IP Remote Code Execution Vulnerability | | Microsoft Edge(Chromium 기반) | CVE-2026-40416 | Microsoft Edge (Chromium-based) Spoofing Vulnerability | | Dynamics Business Central | CVE-2026-40417 | Dynamics Business Central Elevation of Privilege Vulnerability | | Micro

Official advisory ↗
NCSC-NL · Dutch · NCSC-2026-0141Kwetsbaarheden verholpen in Microsoft Windows

Een kwaadwillende kan de kwetsbaarheden misbruiken om aanvallen uit te voeren die kunnen leiden tot de volgende categorieën schade: - Denial-of-Service (DoS) - Uitvoeren van willekeurige code (root/admin-rechten) - Uitvoeren van willekeurige code (gebruikersrechten) - Verkrijgen van verhoogde rechten - Omzeilen van een beveiligingsmaatregel - Toegang tot gevoelige gegevens De ernstigste kwetsbaarheden hebben kenmerken CVE-2026-40402, CVE-2026-41089 en CVE-2026-41096 toegewezen gekregen en bevinden zich respectievelijk in Hyper-V, NETLOGON en de DNS Client. De kwetsbaarheid in Hyper-V stelt een geauthenticeerde kwaadwillende in staat om uit de Guest-VM te breken en toegang te krijgen tot geheugen van de host en mogelijk willekeurige code uit te voeren op de host. De kwetsbaarheden in NETLOGON en de DNS Client stellen een ongeauthenticeerde kwaadwillende op afstand in staat om willekeurige code uit te voeren op het kwetsbare systeem. **Met name Domain Controllers die toegankelijk zijn vanaf externe netwerken lopen een hoog risico voor actief misbruik van de kwetsbaarheid in NETLOGON.** Het verdient altijd aanbeveling om een systeem met de rol van Domain Controller niet publiek toegankelijk te hebben en, indien dit noodzakelijk is, additionele maatregelen te hebben genomen. **Update:** Inmiddels wordt door diverse partijen actief misbruik gemeld van CVE-2026-41089, de kwetsbaarheid in NETLOGON. ``` Windows Projected File System: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-34340 | 7.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Application Identity (AppID) Subsystem: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-34343 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Undisclosed: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-41095 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Remote Desktop: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-40398 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Microsoft Windows DNS: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-41096 | 9.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Ancillary Function Driver for WinSock: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-34344 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-34345 | 7.00 | Verkrijgen van verhoogde rechten | | CVE-2026-35416 | 7.00 | Verkrijgen van verhoogde rechten | | CVE-2026-41088 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Kernel: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-33841 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-35420 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-40369 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Secure Boot: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-41097 | 6.70 | Omzeilen van beveiligingsmaatregel | |----------------|------|-------------------------------------| Windows Native WiFi Miniport Driver: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-32161 | 7.50 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Kernel-Mode Drivers: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-40408 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-34332 | 8.00 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Telnet Client: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-35423 | 5.40 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Windows Print Spooler Components: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-34342 | 7.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows SMB Client: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-40410 | 7.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Storage Spaces Controller: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-35415 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Filtering Platform (WFP): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-32209 | 4.40 | Omzeilen van beveiligingsmaatregel | |----------------|------|-------------------------------------| Windows Volume Manager Extension Driver: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-40380 | 6.20 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Cryptographic Services: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-40377 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Win32K - GRFX: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-33839 | 7.00 | Verkrijgen van verhoogde rechten | | CVE-2026-34330 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-34331 | 7.00 | Verkrijgen van verhoogde rechten | | CVE-2026-34333 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-34347 | 7.00 | Verkrijgen van verhoogde rechten | | CVE-2026-40403 | 8.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Admin Center: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-35438 | 8.30 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Hyper-V: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-40402 | 9.30 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Rich Text Edit Control: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-32170 | 6.70 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Event Logging Service: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-33834 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Internet Key Exchange (IKE) Protocol: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-35424 | 7.50 | Denial-of-Service | |----------------|------|-------------------------------------| Windows Netlogon: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-41089 | 9.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Storport Miniport Driver: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-34350 | 6.50 | Denial-of-Service | |----------------|------|-------------------------------------| Windows Common Log File System Driver: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-40407 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-40397 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Cloud Files Mini Filter Driver: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-35418 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-33835 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-34337 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Win32K - ICOMP: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-33840 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-35417 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows GDI: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-35421 | 7.80 | Uitvoeren van willekeurige code | |----------------|------|-------------------------------------| Windows Rich Text Edit: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-21530 | 6.70 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows TCP/IP: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-34351 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-35422 | 6.50 | Omzeilen van beveiligingsmaatregel | | CVE-2026-40399 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-40405 | 7.50 | Denial-of-Service | | CVE-2026-40406 | 7.50 | Toegang tot gevoelige gegevens | | CVE-2026-40414 | 7.40 | Denial-of-Service | | CVE-2026-40415 | 8.10 | Uitvoeren van willekeurige code | | CVE-2026-33837 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-34334 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-40401 | 6.20 | Denial-of-Service | | CVE-2026-40413 | 7.40 | Denial-of-Service | |----------------|------|-------------------------------------| Windows LDAP - Lightweight Directory Access Protocol: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-34339 | 5.50 | Denial-of-Service | |----------------|------|-------------------------------------| Windows Telephony Service: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-42825 | 7.00 | Verkrijgen van verhoogde rechten | | CVE-2026-34338 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-40382 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows Message Queuing: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-34329 | 8.80 | Uitvoeren van willekeurige code | | CVE-2026-33838 | 7.80 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| Windows DWM Core Library: |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-35419 | 5.50 | Toegang tot gevoelige gegevens | | CVE-2026-42896 | 7.80 | Verkrijgen van verhoogde rechten | | CVE-2026-34336 | 7.80 | Toegang tot gevoelige gegevens | |----------------|------|-------------------------------------| Windows Link-Layer Discovery Protocol (LLDP): |----------------|------|-------------------------------------| | CVE-ID | CVSS | Impact | |----------------|------|-------------------------------------| | CVE-2026-34341 | 7.00 | Verkrijgen van verhoogde rechten | |----------------|------|-------------------------------------| ```

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 12 May 2026 · Last source change 10 Aug 2026, 15:12 UTC · CWE-416 · Use After Free

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-2026-29668
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceOther authority
NVD statusNVD enriched

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-2026-29668↗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-2026-40408 · cve.blacktree.nl