Main Vulnerability Database Vulnerabilities #VU137897

Double free in Microsoft Windows and Windows Server - CVE-2026-50361

Published: July 16, 2026

Vulnerability identifier: #VU137897

CSH Severity: Low

CVSS v4: 8.5 [CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-50361

CWE-ID: CWE-415

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to escalate privileges on the target system.

The vulnerability exists due to a boundary error in Microsoft Brokering File System. A local user can pass specially crafted data to the application, trigger double free error and gain elevated privileges on the system.

Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2026-50361

Install updates from vendor's website.

Microsoft Windows - addressed in versions 11 24H2 10.0.26100.8875, 11 25H2 10.0.26200.8875, 11 26H1 10.0.28000.2269, 11 26H1 10.0.28000.2525
Windows Server - addressed in versions 2012 R2 6.3.9600.23291, 2025 10.0.26100.33158

External References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50361

Related Security Bulletins