CVE-2021-38661: Microsoft Hevc Video Extensions

High severity, CVSS 7.8. EPSS: 2.3% chance of exploitation in the next 30 days.

HEVC Video Extensions Remote Code Execution Vulnerability

Affected products

• Microsoft Hevc Video Extensions: before 1.0.42094.0 (fixed in 1.0.42094.0)

Published 2021-09-15. Last modified 2026-08-10.