Main Vulnerability Database Vulnerabilities #VU122551

Untrusted Pointer Dereference in Windows Server and Windows - CVE-2026-21250

Published: February 10, 2026

Vulnerability identifier: #VU122551

CSH Severity: Low

CVSS v4.0: 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/E:U/U:Clear

CVE-ID: CVE-2026-21250

CWE-ID: CWE-822

Exploitation vector: Local access

Exploit availability: No public exploit available

Vendor: Microsoft

Affected software:
Windows Server
Windows

Detailed vulnerability description

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

The vulnerability exists due to untrusted pointer dereference in Windows HTTP.sys. A local user can gain elevated privileges on the system.

Install updates from vendor's website.