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Full vulnerability report · 2023
CVE-2023-21748High confidence

Windows Kernel Elevation of Privilege Vulnerability

Microsoft · Windows 10 Version 1809

7.8HighCVSS 3.1
Recommended action
Within 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
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.
  • A structured source references public exploit or proof-of-concept material.
  • Exploitation requires an existing local or physical foothold with privileges.
  • EPSS is 0.83% for the current model date.

Compensating controls

  • Restrict local access and enforce least privilege on affected hosts.
  • Increase monitoring for the attack path and post-exploitation behaviour described in the report.

Verification

  1. Confirm that the asset runs Microsoft Windows 10 Version 1809 and falls inside the recorded affected range.
  2. Recheck the vendor advisory before scheduling a change because no verified fixed version is currently retained.
  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-2023-25915

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 with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Fix not verified
01

What, why and how

Windows Kernel Elevation of Privilege Vulnerability

What

Windows Kernel Elevation of Privilege Vulnerability

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

How

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

What

Windows Kernel Elevation of Privilege Vulnerability

Why

The current structured CVE record identifies a security weakness, but the root cause requires confirmation in the linked vendor material.

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.
Reference recorded

CISA Vulnrichment records proof-of-concept exploitation in its SSVC data. BlackTree has not independently executed or validated exploit material.

Likely attack path
local access → vulnerable operation → 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.
CWE not yet assigned
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 escalationPublic exploit reference
A

Official authority intelligence

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

BSI · German · WID-SEC-2023-0055Microsoft Windows und Microsoft Windows Server: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Microsoft Windows und Microsoft Windows Server ausnutzen, um beliebigen Code auszuführen, Sicherheitsmaßnahmen zu umgehen, vertrauliche Informationen offenzulegen, seine Privilegien zu erweitern und einen Denial-of-Service-Zustand auszulösen.

Official advisory ↗
Cyber Security Agency of Singapore · English · CSA-SB-20230111Security Bulletin 11 Jan 2023

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 11 Jan 2023, published on 11 January 2023. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗
CERT-FR · French · CERTFR-2023-AVI-0022Multiples vulnérabilités dans Microsoft Windows

janvier 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21732 Bulletin de sécurité Microsoft CVE-2023-21733 du 10 janvier 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21733 Bulletin de sécurité Microsoft CVE-2023-21739 du 10 janvier 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21739 Bulletin de sécurité Microsoft CVE-2023-21746 du 10 janvier 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21746 Bulletin de sécurité Microsoft CVE-2023-21747 du 10 janvier 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21747 Bulletin de sécurité Microsoft CVE-2023-21748 du 10 janvier 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21748 Bulletin de sécurité Microsoft CVE-2023-21749 du 10 janvier 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21749 Bulletin de sécurité Microsoft CVE-2023-21750 du 10 janvier 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21750 Bulletin de sécurité Microsoft CVE-2023-21752 du 10 janvier 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21752 Bulletin de sécurité Microsoft CVE-2023-21753 du 10 janvier 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21753 Bulletin de sécurité Micr

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-001105複数の Microsoft Windows 製品における権限を昇格される脆弱性

複数の Microsoft Windows 製品には、 Windows カーネルに不備があるため、権限を昇格される脆弱性が存在します。 本脆弱性は、CVE-2023-21747、CVE-2023-21748、CVE-2023-21749、CVE-2023-21750、CVE-2023-21754、CVE-2023-21755、CVE-2023-21772、CVE-2023-21773、CVE-2023-21774 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-001097複数の Microsoft Windows 製品における権限を昇格される脆弱性

複数の Microsoft Windows 製品には、Windows カーネルに不備があるため、権限を昇格される脆弱性が存在します。 本脆弱性は、CVE-2023-21675、CVE-2023-21747、CVE-2023-21748、CVE-2023-21749、CVE-2023-21750、CVE-2023-21754、CVE-2023-21755、CVE-2023-21773、CVE-2023-21774 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-001096複数の Microsoft Windows 製品における権限を昇格される脆弱性

複数の Microsoft Windows 製品には、Windows カーネルに不備があるため、権限を昇格される脆弱性が存在します。 本脆弱性は、CVE-2023-21675、CVE-2023-21747、CVE-2023-21748、CVE-2023-21749、CVE-2023-21750、CVE-2023-21754、CVE-2023-21755、CVE-2023-21772、CVE-2023-21774 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-001095複数の Microsoft Windows 製品における権限を昇格される脆弱性

複数の Microsoft Windows 製品には、Windows カーネルに不備があるため、権限を昇格される脆弱性が存在します。 本脆弱性は、CVE-2023-21675、CVE-2023-21747、CVE-2023-21748、CVE-2023-21749、CVE-2023-21750、CVE-2023-21754、CVE-2023-21755、CVE-2023-21772、CVE-2023-21773 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-001076複数の Microsoft Windows 製品における権限を昇格される脆弱性

複数の Microsoft Windows 製品には、Windows カーネルに不備があるため、権限を昇格される脆弱性が存在します。 本脆弱性は、CVE-2023-21675、CVE-2023-21747、CVE-2023-21748、CVE-2023-21749、CVE-2023-21754、CVE-2023-21755、CVE-2023-21772、CVE-2023-21773、CVE-2023-21774 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-001075複数の Microsoft Windows 製品における権限を昇格される脆弱性

複数の Microsoft Windows 製品には、Windows カーネルに不備があるため、権限を昇格される脆弱性が存在します。 本脆弱性は、CVE-2023-21675、CVE-2023-21747、CVE-2023-21748、CVE-2023-21750、CVE-2023-21754、CVE-2023-21755、CVE-2023-21772、CVE-2023-21773、CVE-2023-21774 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-001074複数の Microsoft Windows 製品における権限を昇格される脆弱性

複数の Microsoft Windows 製品には、Windows カーネルに不備があるため、権限を昇格される脆弱性が存在します。 本脆弱性は、CVE-2023-21675、CVE-2023-21747、CVE-2023-21749、CVE-2023-21750、CVE-2023-21754、CVE-2023-21755、CVE-2023-21772、CVE-2023-21773、CVE-2023-21774 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-001073複数の Microsoft Windows 製品における権限を昇格される脆弱性

複数の Microsoft Windows 製品には、Windows カーネルに不備があるため、権限を昇格される脆弱性が存在します。 本脆弱性は、CVE-2023-21675、CVE-2023-21748、CVE-2023-21749、 CVE-2023-21750、CVE-2023-21754、CVE-2023-21755、CVE-2023-21772、CVE-2023-21773、CVE-2023-21774 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-001072Microsoft Windows 10 および Windows 11 における権限を昇格される脆弱性

Microsoft Windows 10 および Windows 11 には、Windows カーネルに不備があるため、権限を昇格される脆弱性が存在します。 本脆弱性は、CVE-2023-21675、CVE-2023-21747、CVE-2023-21748、CVE-2023-21749、CVE-2023-21750、CVE-2023-21754、CVE-2023-21772、CVE-2023-21773、CVE-2023-21774 とは異なる脆弱性です。

Official advisory ↗
JVN iPedia · Japanese · JVNDB-2023-001071複数の Microsoft Windows 製品における権限を昇格される脆弱性

複数の Microsoft Windows 製品には、Windows カーネルに不備があるため、権限を昇格される脆弱性が存在します。 本脆弱性は、CVE-2023-21675、CVE-2023-21747、CVE-2023-21748、CVE-2023-21749、CVE-2023-21750、CVE-2023-21755、CVE-2023-21772、CVE-2023-21773、CVE-2023-21774 とは異なる脆弱性です。

Official advisory ↗
KISA KrCERT/CC · Korean · KNVD-5823MS 1월 보안 위협에 따른 정기 보안 업데이트 권고

Smart Card CVE-2023-21759 Windows 스마트 카드 리소스 관리 서버 보안 기능 우회 취약점 Windows IKE Extension CVE-2023-21758 Windows 인터넷 키 교환(IKE) 확장 서비스 거부 취약점 Windows Remote Access Service L2TP Driver CVE-2023-21757 Windows 계층 2 터널링 프로토콜(L2TP) 서비스 거부 취약점 Windows Kernel CVE-2023-21755 Windows 커널 권한 상승 취약점 Windows Management Instrumentation CVE-2023-21754 Windows 커널 권한 상승 취약점 Windows Kernel CVE-2023-21753 Windows 정보 공개 취약점에 대한 이벤트 추적 Windows Backup Engine CVE-2023-21752 Windows 백업 서비스 권한 상승 취약점 Windows Virtual Registry Provider CVE-2023-21750 Windows 커널 권한 상승 취약점 Windows Virtual Registry Provider CVE-2023-21749 Windows 커널 권한 상승 취약점 Windows Virtual Registry Provider CVE-2023-21748 Windows 커널 권한 상승 취약점 Windows Virtual Registry Provider CVE-2023-21747 Windows 커널 권한 상승 취약점 Windows NTLM CVE-2023-21746 Windows NTLM 권한 상승 취약점 Microsoft Exchange Server CVE-2023-21745 Microsoft Exchange Server 스푸핑 취약점 Microsoft Office SharePoint CVE-2023-21744 Microsoft SharePoint Server 원격 코드 실행 취약점 Microsoft Office SharePoint CVE-2023-21743 Microsoft SharePoint Server 보안 기능 우회 취약점 Microsoft Office SharePoint CVE-2023-21742 Microsoft SharePoint Server 원격 코드 실행 취약점 Microsoft Office Visio CVE-2023-21741 Microsoft Office Visio 정보 공개 취약점 Microsoft Bluetooth Driver CVE-2023-21739 Windows Bluetooth 드라이버 권한 상승 취약점 Microsoft Office Visio CVE-2023-21

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.
Fix not verified
Affected
  • Windows 10 Version 1809: 10.0.17763.0 < 10.0.17763.3887, 10.0.0 < 10.0.17763.3887
  • Windows Server 2019: 10.0.17763.0 < 10.0.17763.3887
  • Windows Server 2019 (Server Core installation): 10.0.17763.0 < 10.0.17763.3887
  • Windows Server 2022: 10.0.20348.0 < 10.0.20348.1487
  • Windows 10 Version 20H2: 10.0.0 < 10.0.19042.2486
  • Windows 11 version 21H2: 10.0.0 < 10.0.22000.1455
  • Windows 10 Version 21H2: 10.0.19043.0 < 10.0.19044.2486
  • Windows 11 version 22H2: 10.0.22621.0 < 10.0.22621.1105
  • Windows 10 Version 22H2: 10.0.19045.0 < 10.0.19045.2486
  • Windows 10 Version 1507: 10.0.10240.0 < 10.0.10240.19685
  • Windows 10 Version 1607: 10.0.14393.0 < 10.0.14393.5648
  • Windows Server 2016: 10.0.14393.0 < 10.0.14393.5648
  • Windows Server 2016 (Server Core installation): 10.0.14393.0 < 10.0.14393.5648
  • Windows 7: 6.1.0 < 6.1.7601.26321
  • Windows 7 Service Pack 1: 6.1.0 < 6.1.7601.26321
  • Windows 8.1: 6.3.0 < 6.3.9600.20778
  • Windows Server 2008 Service Pack 2: 6.0.6003.0 < 6.0.6003.21872
  • Windows Server 2008 Service Pack 2 (Server Core installation): 6.0.6003.0 < 6.0.6003.21872
  • Windows Server 2008 Service Pack 2: 6.0.6003.0 < 6.0.6003.21872
  • Windows Server 2008 R2 Service Pack 1: 6.1.7601.0 < 6.1.7601.26321
  • Windows Server 2008 R2 Service Pack 1 (Server Core installation): 6.1.7601.0 < 6.1.7601.26321
  • Windows Server 2012: 6.2.9200.0 < 6.2.9200.24075
  • Windows Server 2012 (Server Core installation): 6.2.9200.0 < 6.2.9200.24075
  • Windows Server 2012 R2: 6.3.9600.0 < 6.3.9600.20778
  • Windows Server 2012 R2 (Server Core installation): 6.3.9600.0 < 6.3.9600.20778
Fixed
No fixed version is explicitly recorded in the structured CVE data.
Action
No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround
No verified workaround is recorded. Limit untrusted access and use least privilege until authoritative guidance is available.
04

Evidence and provenance

Published 10 Jan 2023 · Last source change 12 Apr 2025, 03:55 UTC · CWE not yet assigned

CVE recordCVE.org · 5.1
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-2023-25915
Product sourceCNA
Remediation sourceCVE/CNA references
CWE sourceUnavailable
NVD statusNVD modified after enrichment

Missing structured fields: CWE classification. Missing data is not evidence of low risk; review the primary advisory.

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-2023-25915↗CISA Vulnrichment SSVC evidence↗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-2023-21748 · cve.blacktree.nl