Main Vulnerability Database Vulnerabilities #VU164911

Untrusted Pointer Dereference in Microsoft Windows and Windows Server - CVE-2026-112989

Published: November 11, 2026

Vulnerability identifier: #VU164911

CSH Severity: Low

CVSS v4: 7.3 [CVSS:4.0/AV:L/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-112989

CWE-ID: CWE-822

Exploitation vector: Local access

Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a local user to escalate privileges to SYSTEM.

The vulnerability exists due to untrusted pointer dereference in Windows Servicing Stack Updates when dereferencing an untrusted pointer during servicing operations. A local user can exploit this flaw locally to gain SYSTEM privileges.

Successful exploitation requires winning a race condition.

Affected software

Microsoft Windows
Windows Server

How to mitigate CVE-2026-112989

Install security update from vendor's website.

Microsoft Windows - addressed in versions 11 24H2 10.0.26100.9974, 11 25H2 10.0.26200.9974
Windows Server - update to 2025 10.0.26100.33822

External References

https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2026-112989

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