CVE-2026-72929: CWE-354: Improper Validation of Integrity Check Value in Microsoft Windows 11 version 23H2
Description
CVE-2026-72929 is a high-severity vulnerability in Microsoft Windows 11 version 23H2 involving improper validation of an integrity check value in the Windows Installer. This flaw allows an authorized local attacker to elevate privileges. The vulnerability affects multiple builds of Windows 11 23H2 prior to specific patched versions. An official fix is available from Microsoft.
CVSS v3.1
Score 7.8high
Affected software
Microsoft
Windows 11 version 23H2
Microsoft
Windows 11 Version 23H2
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
CVE-2026-72929 is a vulnerability classified under CWE-354 (Improper Validation of Integrity Check Value) affecting Windows Installer in Microsoft Windows 11 version 23H2. The flaw allows an authorized local attacker to elevate privileges by exploiting improper validation of integrity check values. The vulnerability has a CVSS 3.1 base score of 7.8, indicating high severity, with impacts on confidentiality, integrity, and availability. Multiple affected Windows 11 builds are identified, all prior to their respective patched versions. Microsoft has released an official fix for this vulnerability as documented in their security update guide.
Potential Impact
An authorized local attacker can exploit this vulnerability to elevate privileges on the affected Windows 11 systems. The CVSS score of 7.8 reflects high impact on confidentiality, integrity, and availability. There are no known exploits in the wild at this time.
Mitigation Recommendations
An official fix is available from Microsoft. Users and administrators should apply the security updates provided by Microsoft for Windows 11 version 23H2 to remediate this vulnerability. Refer to the Microsoft security update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72929 for detailed patch information and deployment instructions.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-08-10T18:14:23.516Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72929","vendor":"Microsoft"}]
Threat ID: 6aa04542acd9273b49fa9c79
Added to database: 09/08/2026, 17:26:26 UTC
Last enriched: 10/16/2026, 21:44:48 UTC
Last updated: 10/23/2026, 15:10:14 UTC
Views: 39
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