Main Vulnerability Database Vulnerabilities #VU137739

Race condition in Microsoft Windows and Windows Server - CVE-2026-54991

Published: July 15, 2026

Vulnerability identifier: #VU137739

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-2026-54991

CWE-ID: CWE-362

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

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

The vulnerability exists due to a race condition in Windows USB Print Driver. A local user can exploit the race and gain unauthorized access to sensitive information and escalate privileges on the system.

Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2026-54991

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 10.0.28000.2525
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-2026-54991

Related Security Bulletins