CVE-2026-97792: CWE-732: Incorrect Permission Assignment for Critical Resource in Microsoft Windows 11 version 23H2
Description
CVE-2026-97792 is a high-severity vulnerability in Microsoft Windows 11 version 23H2 involving improper access control in the Windows Container Isolation FS Filter Driver (unionfs.sys). This flaw allows an authorized local attacker to elevate privileges. The vulnerability affects multiple builds of Windows 11 23H2 prior to their respective 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 26H2
Microsoft
Windows Server 2022
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 CWE-732 (Incorrect Permission Assignment for Critical Resource), exists in the Windows Container Isolation FS Filter Driver (unionfs.sys) component of Windows 11 version 23H2. It allows an authorized local attacker to elevate privileges due to improper access control. The CVSS 3.1 base score is 7.8, indicating high severity, with impact on confidentiality, integrity, and availability. Multiple affected Windows 11 builds are specified, all fixed in later updates. Microsoft has published an official fix for this issue.
Potential Impact
An authorized local attacker can leverage this vulnerability to elevate privileges on a vulnerable Windows 11 system, potentially gaining higher-level access than intended. The impact includes full compromise of confidentiality, integrity, and availability of the affected system components.
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 Response Center advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97792 for update details and guidance.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-09-25T04:41:33.498Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97792","vendor":"Microsoft"}]
Threat ID: 6ace85942cdf04f656a018e9
Added to database: 10/13/2026, 19:25:08 UTC
Last enriched: 10/13/2026, 22:49:23 UTC
Last updated: 10/14/2026, 03:28:15 UTC
Views: 3
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