Sep 2026: Windows Update Stack Elevation of Privilege Vulnerability: CVE-2026-81963 September 2026

Sep 2026: Windows Update Stack Elevation of Privilege Vulnerability
CVE-2026-81963 Published on September 8, 2026

Windows Update Stack Elevation of Privilege Vulnerability
Improper link resolution before file access ('link following') in Windows Update Stack allows an authorized attacker to elevate privileges locally.

Weakness Types

What is an insecure temporary file Vulnerability?

The software attempts to access a file based on the filename, but it does not properly prevent that filename from identifying a link or shortcut that resolves to an unintended resource.

CVE-2026-81963 has been classified to as an insecure temporary file vulnerability or weakness.

What is an Authorization Vulnerability?

The software does not restrict or incorrectly restricts access to a resource from an unauthorized actor.

CVE-2026-81963 has been classified to as an Authorization vulnerability or weakness.

Products Associated with CVE-2026-81963

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Affected Versions

Version 10.0.22631.0 and below 10.0.22631.7582 is affected.

Version 10.0.26100.0 and below 10.0.26100.9445 is affected.

Version 10.0.26200.0 and below 10.0.26200.9445 is affected.

Version 10.0.28000.0 and below 10.0.28000.2954 is affected.