CVE-2026-26181: CWE-416: Use After Free in Microsoft Windows 11 version 22H3
Use after free in Microsoft Brokering File System allows an authorized attacker to elevate privileges locally.
AI Analysis
Technical Summary
This vulnerability involves a use-after-free condition in the Microsoft Brokering File System on Windows 11 version 22H3 (build 10.0.22631.0). Exploitation requires local access with some privileges and does not require user interaction. Successful exploitation could lead to full system compromise by elevating privileges. Microsoft has released an official fix to remediate this vulnerability.
Potential Impact
An authorized local attacker can exploit this vulnerability to elevate privileges, potentially gaining higher-level access to the system. The CVSS score of 7.8 reflects high impact on confidentiality, integrity, and availability, meaning the attacker could execute arbitrary code or cause system instability.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26181 as soon as possible to remediate this vulnerability.
CVE-2026-26181: CWE-416: Use After Free in Microsoft Windows 11 version 22H3
Description
Use after free in Microsoft Brokering File System allows an authorized attacker to elevate privileges locally.
CVSS v3.1
Score 7.8high
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability involves a use-after-free condition in the Microsoft Brokering File System on Windows 11 version 22H3 (build 10.0.22631.0). Exploitation requires local access with some privileges and does not require user interaction. Successful exploitation could lead to full system compromise by elevating privileges. Microsoft has released an official fix to remediate this vulnerability.
Potential Impact
An authorized local attacker can exploit this vulnerability to elevate privileges, potentially gaining higher-level access to the system. The CVSS score of 7.8 reflects high impact on confidentiality, integrity, and availability, meaning the attacker could execute arbitrary code or cause system instability.
Mitigation Recommendations
An official fix is available from Microsoft. It is recommended to apply the security update provided in the Microsoft advisory at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26181 as soon as possible to remediate this vulnerability.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- microsoft
- Date Reserved
- 2026-02-11T18:33:57.777Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- official-fix
- Vendor Advisory Urls
- [{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-26181","vendor":"Microsoft"}]
Threat ID: 69de7a1d82d89c981fd6a71c
Added to database: 4/14/2026, 5:32:13 PM
Last enriched: 5/19/2026, 10:36:35 AM
Last updated: 5/30/2026, 6:43:29 PM
Views: 56
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