CVE-2026-44801 Remote Desktop Client Remote Code Execution Vulnerability

High 7.5 Published 9 Jun 2026 Updated 24 Sep 2026

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

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-44801?

CVE-2026-44801 is a high-severity use after free vulnerability in Microsoft Windows 10 1607, published on 9 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

Official description

Use after free in Remote Desktop Client allows an unauthorized attacker to execute code over a network.

Weakness: CWE-787, CWE-416

Which versions are affected by CVE-2026-44801?

It affects 15 products.

Products include Microsoft Remote Desktop Client, Microsoft Windows 10 1607, Microsoft Windows 10 1809, Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 23h2 and 9 more.

How do I fix CVE-2026-44801?

No fix has been published for CVE-2026-44801 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-2026-44801 being exploited?

There is no known exploitation of CVE-2026-44801 in the wild and no public exploit code.

All Microsoft Windows 10 1607 vulnerabilities

Sources

Also known as GHSA-g3rg-85ff-6538.