CVE-2025-21372

Microsoft Brokering File System Elevation of Privilege Vulnerability

CVE-2025-21372 is fixed in 5 products on 1 platform, first by KB5050009, released January 14, 2025. It is not reported as exploited. Patch Radar priority: High.

High

CVSS

7.8

Important

Exploitation

None reported

Exploitation Less Likely

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.0041

34th percentile

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
Windows 11 Version 24H2 for ARM64-based Systems	26100.2894	KB5050009	Jan 14, 2025
Windows 11 Version 24H2 for x64-based Systems	26100.2894	KB5050009	Jan 14, 2025
Windows Server 2022, 23H2 Edition (Server Core installation)	25398.1369	KB5049984	Jan 14, 2025
Windows Server 2025	26100.2894	KB5050009	Jan 14, 2025
Windows Server 2025 (Server Core installation)	26100.2894	KB5050009	Jan 14, 2025

Details

Published
January 14, 2025
Weakness
Use After Free
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21372

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