CVE-2021-28311: Microsoft Windows 10

Medium severity, CVSS 6.5. EPSS: 2.5% chance of exploitation in the next 30 days.

Windows Application Compatibility Cache Denial of Service Vulnerability

Affected products

• Microsoft Windows 10: version 20h2 only; version 1607 only; version 1803 only; version 1809 only; version 1909 only; version 2004 only
• Microsoft Windows Server 2016: affected versions not specified; version 20h2 only; version 1909 only; version 2004 only
• Microsoft Windows Server 2019: affected versions not specified

Published 2021-04-13. Last modified 2026-06-17.