Main Vulnerability Database Vulnerabilities #VU121369

Incorrect Privilege Assignment in Windows and Windows Server - CVE-2026-20852

Published: January 14, 2026

Vulnerability identifier: #VU121369

CSH Severity: Low

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

CVE-ID: CVE-2026-20852

CWE-ID: CWE-266

Exploitation vector: Local access

Exploit availability: No public exploit available

Vendor: Microsoft

Affected software:
Windows
Windows Server

Detailed vulnerability description

The vulnerability allows a local attacker to compromise the target system.

The vulnerability exists due to incorrect privilege assignment in Windows Hello. A local attacker can perform tampering on the system.

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