CVE-2026-69599 Remote Desktop Services Remote Code Execution Vulnerability

High 7.5 Published 8 Sep 2026 Updated 14 Oct 2026

An authorized attacker can execute arbitrary code over the network via a use-after-free flaw in Windows Remote Desktop Services.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-69599?

CVE-2026-69599 is a high-severity use after free vulnerability in Microsoft Windows 11 23h2, published on 8 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

Use after free in Windows Remote Desktop Services allows an authorized attacker to execute code over a network.

Weakness: CWE-416

Which versions are affected by CVE-2026-69599?

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-2026-69599?

No fix has been published for CVE-2026-69599 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.

Is CVE-2026-69599 being exploited?

There is no known exploitation of CVE-2026-69599 in the wild and no public exploit code.

All Microsoft Windows 11 23h2 vulnerabilities

Sources

Also known as GHSA-c456-5m28-5rcr.