CVE-2026-58600 HEVC Video Extensions Elevation of Privilege Vulnerability

High 7.8 Published 8 Sep 2026 Updated 14 Oct 2026

A heap-based buffer overflow in the Windows HEVC Video Extensions allows local attackers to elevate privileges.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-58600?

CVE-2026-58600 is a high-severity memory corruption vulnerability in Microsoft HEVC Video Extensions, published on 8 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

Heap-based buffer overflow in Microsoft Windows Codecs Library allows an unauthorized attacker to elevate privileges locally.

Weakness: CWE-122

Which versions are affected by CVE-2026-58600?

It affects 3 products.

Products include Microsoft Hevc Video Extensions, Microsoft Hevc Video Extensions for Licensed Applications, Microsoft Hevc Video Extensions From Device Manufacturer.

How do I fix CVE-2026-58600?

No fix has been published for CVE-2026-58600 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-2026-58600 being exploited?

There is no known exploitation of CVE-2026-58600 in the wild and no public exploit code.

Sources

Also known as GHSA-j9hq-499p-g5xg.