CVE-2020-0993: Microsoft Windows 10

Medium severity, CVSS 6.5. EPSS: 5.2% chance of exploitation in the next 30 days.

A denial of service vulnerability exists in Windows DNS when it fails to properly handle queries, aka 'Windows DNS Denial of Service Vulnerability'.

Affected products

• Microsoft Windows 10: affected versions not specified; version 1607 only; version 1709 only; version 1803 only; version 1809 only; version 1903 only; …
• Microsoft Windows 7: affected versions not specified
• Microsoft Windows 8.1: affected versions not specified
• Microsoft Windows Rt 8.1: affected versions not specified
• Microsoft Windows Server 2008: version r2 only
• Microsoft Windows Server 2012: affected versions not specified; version r2 only
• Microsoft Windows Server 2016: affected versions not specified; version 1803 only; version 1903 only; version 1909 only
• Microsoft Windows Server 2019: affected versions not specified

Published 2020-04-15. Last modified 2026-06-17.