Summary
Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
What privileges could be gained by an attacker who successfully exploited this vulnerability?
An attacker who successfully exploited this vulnerability could gain SYSTEM privileges.
Security updates
10.0.26100.33822 — https://support.microsoft.com/help/5131080
10.0.26100.33730 — https://support.microsoft.com/help/5131077
10.0.26200.9974 — https://support.microsoft.com/help/5132061
10.0.26200.9911 — https://support.microsoft.com/help/5132043
10.0.28000.3501 — https://support.microsoft.com/help/5132059
Vulnerabilities 1
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High 7.8
Microsoft Brokering File System Elevation of Privilege Vulnerability
Incorrect permission assignment for critical resource in Windows Brokering File System allows an authorized attacker to elevate privileges locally.
Revision history
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#1
Information published.
References
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CVE-2026-85929 Microsoft Brokering File System Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-85929
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss