CVE-2026-72929 Windows Installer Elevation of Privilege Vulnerability

High 7.8 Published 8 Sep 2026 Updated 14 Oct 2026

An authorized local attacker can elevate privileges by exploiting improper integrity check validation in Windows Installer.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-72929?

CVE-2026-72929 is a high-severity vulnerability in Microsoft Windows 11 23h2, published on 8 Sep 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Improper validation of integrity check value in Windows Installer allows an authorized attacker to elevate privileges locally.

Weakness: CWE-354

Which versions are affected by CVE-2026-72929?

It affects 5 products.

Products include Microsoft Windows 11 23h2, Microsoft Windows 11 24h2, Microsoft Windows 11 25h2, Microsoft Windows 11 26h1, Microsoft Windows Server 2025.

How do I fix CVE-2026-72929?

No fix has been published for CVE-2026-72929 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-72929 being exploited?

There is no known exploitation of CVE-2026-72929 in the wild and no public exploit code.

All Microsoft Windows 11 23h2 vulnerabilities

Sources

Also known as GHSA-43fc-f68q-94c4.