Main Vulnerability Database Vulnerabilities #VU121267

Race condition in Windows and Windows Server - CVE-2026-20926

Published: January 13, 2026

Vulnerability identifier: #VU121267

CSH Severity: Medium

CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

CVE-ID: CVE-2026-20926

CWE-ID: CWE-362

Exploitation vector: Remote access

Exploit availability: No public exploit available

Vendor: Microsoft

Affected software:
Windows
Windows Server

Detailed vulnerability description

The vulnerability allows a remote attacker to escalate privileges on the system.

The vulnerability exists due to a race condition in Windows SMB Server. A remote user can exploit the race and escalate privileges on the system.

Install updates from vendor's website.