Microsoft Windows Installer Privilege Escalation Vulnerability

Microsoft Windows Installer contains a privilege escalation vulnerability when MSI packages process symbolic links, which allows attackers to bypass access restrictions to add or remove files.

Published 14 Oct 2026Updated 14 Oct 202695 sources
CVSS 10.0 ✓ VERIFIED REFERENCE△ CISA KEV

What happened

Microsoft Windows Installer contains a privilege escalation vulnerability when MSI packages process symbolic links, which allows attackers to bypass access restrictions to add or remove files.

Affected versions

Windows: See original advisory Fixed: See vendor advisory.

Why it matters

This source correlation may provide earlier visibility while structured CVE metadata is still being updated.

Detection & mitigation

  • Review the original advisory and validate affected versions.
  • Apply vendor-provided updates or mitigations when available.

Public PoC references