CVE-2021-34438: Microsoft Windows 10

High severity, CVSS 7.8. EPSS: 2.2% chance of exploitation in the next 30 days.

Windows Font Driver Host Remote Code Execution Vulnerability

Affected products

• Microsoft Windows 10: version 20h2 only; version 21h1 only; version 1809 only; version 1909 only; version 2004 only
• Microsoft Windows Server 2016: version 20h2 only; version 2004 only
• Microsoft Windows Server 2019: affected versions not specified

Published 2021-07-16. Last modified 2026-08-10.