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MSRC compact vulnerability detail

CVE-2026-32091 · Microsoft Brokering File System Elevation of Privilege Vulnerability

Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Brokering File System allows an unauthorized attacker to elevate privileges locally.

Severity
Important
Impact
Elevation of Privilege
CVSS
8.4 base · 7.3 temporal
Release
2026-04-14
Signals
Microsoft Brokering File System Elevation of Privilege Exploited: No Publicly disclosed: No Exploitability: Exploitation Less Likely
CWE
CWE-362: Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition') CWE-416: Use After Free
Patch Diff
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Resolved binary override
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Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Brokering File System allows an unauthorized attacker to elevate privileges locally.
FAQ / Articles
Microsoft Brokering File System Elevation of Privilege Vulnerability
Concurrent execution using shared resource with improper synchronization ('race condition') in Microsoft Brokering File System allows an unauthorized attacker to elevate privileges locally.
FAQ
What privileges could be gained by an attacker who successfully exploited the vulnerability? An attacker who successfully exploited this vulnerability could gain the privileges of the logged-on user.