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, identified as CVE-2026-45654 and classified under CWE-284 (Improper Access Control), affects Windows 11 Version 24H2 (build 10.0.26100.0). It involves a weakness in the Windows Secure Boot process that permits an attacker with authorized local access and high privileges to bypass security controls. The CVSS v3.1 base score is 7.9, reflecting high impact on confidentiality and integrity without affecting availability. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
An attacker with high-level privileges on the affected system can bypass Secure Boot protections, potentially leading to unauthorized access or modification of system components. This could compromise system integrity and confidentiality, but does not impact system availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. Users and administrators should apply the provided security update promptly to mitigate the risk. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45654 for detailed patching instructions.
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
Microsoft
Windows 11 Version 24H2
Microsoft
Windows 11 Version 25H2
Microsoft
Windows 11 version 26H1
Microsoft
Windows Server 2025
Microsoft
Windows Server 2025 (Server Core installation)
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability, identified as CVE-2026-45654 and classified under CWE-284 (Improper Access Control), affects Windows 11 Version 24H2 (build 10.0.26100.0). It involves a weakness in the Windows Secure Boot process that permits an attacker with authorized local access and high privileges to bypass security controls. The CVSS v3.1 base score is 7.9, reflecting high impact on confidentiality and integrity without affecting availability. Microsoft has published an official fix to remediate this vulnerability.
Potential Impact
An attacker with high-level privileges on the affected system can bypass Secure Boot protections, potentially leading to unauthorized access or modification of system components. This could compromise system integrity and confidentiality, but does not impact system availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
Microsoft has released an official fix for this vulnerability. Users and administrators should apply the provided security update promptly to mitigate the risk. Refer to the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-45654 for detailed patching instructions.
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: 08/14/2026, 13:45:27 UTC
Last updated: 09/13/2026, 22:01:34 UTC
Views: 80
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.