CVE-2026-45654: CWE-284: Improper Access Control in Microsoft Windows 11 Version 24H2
Improper access control in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-45654) concerns improper access control in the Windows Secure Boot mechanism on Microsoft Windows 11 Version 24H2 (build 10.0.26100.0). It enables an attacker with local access and high privileges to bypass Secure Boot protections, potentially compromising system integrity. The vulnerability has been assigned a CVSS 3.1 base score of 7.9, reflecting high impact on confidentiality and integrity without affecting availability. Microsoft has published an official fix to remediate this issue.
Potential Impact
An authorized local attacker with high privileges can bypass Secure Boot security controls, which may lead to unauthorized code execution or compromise of system integrity. Confidentiality and integrity impacts are high, but availability is not affected. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45654 to remediate this vulnerability.
CVE-2026-45654: CWE-284: Improper Access Control in Microsoft Windows 11 Version 24H2
Description
Improper access control in Windows Secure Boot allows an authorized attacker to bypass a security feature locally.
CVSS v3.1
Score 7.9high
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-45654) concerns improper access control in the Windows Secure Boot mechanism on Microsoft Windows 11 Version 24H2 (build 10.0.26100.0). It enables an attacker with local access and high privileges to bypass Secure Boot protections, potentially compromising system integrity. The vulnerability has been assigned a CVSS 3.1 base score of 7.9, reflecting high impact on confidentiality and integrity without affecting availability. Microsoft has published an official fix to remediate this issue.
Potential Impact
An authorized local attacker with high privileges can bypass Secure Boot security controls, which may lead to unauthorized code execution or compromise of system integrity. Confidentiality and integrity impacts are high, but availability is not affected. No known exploits are reported in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45654 to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-05-12T20:33:35.157Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45654","vendor":"Microsoft"}]
Threat ID: 6a284ce98dd33fbd85664efe
Added to database: 06/09/2026, 17:27:05 UTC
Last enriched: 07/29/2026, 22:03:08 UTC
Last updated: 07/31/2026, 21:26:44 UTC
Views: 60
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