CVE tracker / CVE-2025-49677

CVE-2025-49677

CVE-2025-49677 is the Microsoft Brokering File System Elevation of Privilege Vulnerability. Microsoft rates it Important, CVSS 7.0. It is not in CISA's Known Exploited Vulnerabilities catalog. Published July 8, 2025.

Risk summary

HighElevation of Privilege

7.0

CVSS v3 base

1.1%

EPSS: chance of exploitation in 30 days

High

Severity

Important

Microsoft's rating

Less Likely

Microsoft: exploitation

In CISA KEV

Microsoft describes it: “Use after free in Microsoft Brokering File System allows an authorized attacker to elevate privileges locally.”

How to fix it

Microsoft lists 2 affected products and the update that fixes each:

KB5062552 · fixed build 10.0.22621.5624
Windows 11 Version 22H2 for x64-based Systems, Windows 11 Version 22H2 for ARM64-based Systems

What Microsoft changed

July 8, 2025: Information published.

Details

Weakness: CWE-416: Use After Free
Publicly disclosed (Microsoft): No
Exploited (Microsoft): No
Known exploited (CISA KEV): Not listed
Published: July 8, 2025
Last revised: July 8, 2025

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References

Microsoft Security Update Guide NVD CVE record CWE

From Microsoft, CISA, NVD and FIRST data; the Microsoft details were read when this page was opened. Check the references above before you act.