CVE-2026-69942 Windows Overlay Filter Remote Code Execution Vulnerability

High 7.8 Published 13 Oct 2026 Updated 29 Oct 2026

An authorized local attacker can execute arbitrary code via a buffer over-read in the Windows Overlay Filter.

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-2026-69942?

CVE-2026-69942 is a high-severity memory corruption vulnerability in Microsoft Windows 11 23h2, published on 13 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Buffer over-read in Windows Overlay Filter allows an authorized attacker to execute code locally.

Weakness: CWE-126

Which versions are affected by CVE-2026-69942?

It affects 7 products.

Products include Microsoft Windows 11 23h2, Microsoft Windows 11 24h2, Microsoft Windows 11 25h2, Microsoft Windows 11 26h1, Microsoft Windows 11 26h2, Microsoft Windows Server 2022 and 1 more.

How do I fix CVE-2026-69942?

No fix has been published for CVE-2026-69942 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-69942 being exploited?

There is no known exploitation of CVE-2026-69942 in the wild and no public exploit code.

All Microsoft Windows 11 23h2 vulnerabilities

Sources

Also known as GHSA-hrfr-gx4q-r2mj.