CVE-2021-1644: Microsoft Hevc Video Extensions

High severity, CVSS 7.8. EPSS: 4.1% chance of exploitation in the next 30 days.

HEVC Video Extensions Remote Code Execution Vulnerability

Affected products

• Microsoft Hevc Video Extensions: before 1.0.33242.0 (fixed in 1.0.33242.0)

Published 2021-01-12. Last modified 2026-06-17.