CVE-2025-53142: Microsoft Brokering File System Elevation of Privilege Vulnerability

Severity: high (CVSS 7.0 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2025-08-12 · updated 2026-06-17
Weakness: CWE-416

Description

Use after free in Microsoft Brokering File System allows an authorized attacker to elevate privileges locally.

Affected products

Microsoft Windows 11: before 10.0.22621.5768 — fixed in 10.0.22621.5768
Microsoft Windows 11: before 10.0.22631.5768 — fixed in 10.0.22631.5768
Microsoft Windows 11: before 10.0.26100.4851 — fixed in 10.0.26100.4851
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.1791 — fixed in 10.0.25398.1791
Microsoft Windows Server 2025: before 10.0.26100.4851 — fixed in 10.0.26100.4851
Microsoft Windows 11: from 10.0.22621.0 before 10.0.22621.5768 — fixed in 10.0.22621.5768
Microsoft Windows 11 version 22H3: from 10.0.22631.0 before 10.0.22631.5768 — fixed in 10.0.22631.5768
Microsoft Windows 11: from 10.0.22631.0 before 10.0.22631.5768 — fixed in 10.0.22631.5768
Microsoft Windows 11: from 10.0.26100.0 before 10.0.26100.4946 — fixed in 10.0.26100.4946
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): from 10.0.25398.0 before 10.0.25398.1791 — fixed in 10.0.25398.1791
Microsoft Windows Server 2025: from 10.0.26100.0 before 10.0.26100.4946 — fixed in 10.0.26100.4946

How to fix

Upgrade to a fixed version: Microsoft Windows 11 10.0.22621.5768; Microsoft Windows 11 10.0.22631.5768; Microsoft Windows 11 10.0.26100.4851; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1791; Microsoft Windows Server 2025 10.0.26100.4851; Microsoft Windows 11 10.0.22621.5768; Microsoft Windows 11 version 22H3 10.0.22631.5768; Microsoft Windows 11 10.0.22631.5768; Microsoft Windows 11 10.0.26100.4946; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1791; Microsoft Windows Server 2025 10.0.26100.4946. Check the vendor advisory for mitigations.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-53142

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