What’s Vulnerable › Vulnerabilities

CVE-2025-49677: 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: 1.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-07-08 · 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 10.0.22621.5624 — fixed in 10.0.22621.5624
• Microsoft Windows 11: from 10.0.22621.0 before 10.0.22621.5624 — fixed in 10.0.22621.5624

How to fix

Upgrade to a fixed version: Microsoft Windows 11 10.0.22621.5624; Microsoft Windows 11 10.0.22621.5624. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49677

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