CVE-2026-69597 Windows HTTP.sys Elevation of Privilege Vulnerability

High 7.1 Published 8 Sep 2026 Updated 14 Oct 2026

An authorized attacker can elevate privileges over the network via a use-after-free flaw in Windows HTTP.sys.

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

What is CVE-2026-69597?

CVE-2026-69597 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, and only if a user opens a file or follows a link.

Official description

Use after free in Windows HTTP.sys allows an authorized attacker to elevate privileges over a network.

Weakness: CWE-416

Which versions are affected by CVE-2026-69597?

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-2026-69597?

No fix has been published for CVE-2026-69597 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-2026-69597 being exploited?

There is no known exploitation of CVE-2026-69597 in the wild and no public exploit code.

All Microsoft Windows 11 23h2 vulnerabilities

Sources

Also known as GHSA-p2ff-wwv8-rrpv.