CVE-2020-1228: Microsoft Windows Server 2008

High severity, CVSS 7.5. EPSS: 4.5% chance of exploitation in the next 30 days.

A denial of service vulnerability exists in Windows DNS when it fails to properly handle queries. An attacker who successfully exploited this vulnerability could cause the DNS service to become nonresponsive. To exploit the vulnerability, an authenticated attacker could send malicious DNS queries to a target, resulting in a denial of service. The update addresses the vulnerability by correcting how Windows DNS processes queries.

Affected products

Microsoft Windows Server 2008: affected versions not specified; version r2 only
Microsoft Windows Server 2012: affected versions not specified; version r2 only
Microsoft Windows Server 2016: affected versions not specified; version 1903 only; version 1909 only; version 2004 only
Microsoft Windows Server 2019: affected versions not specified

Published 2020-09-11. Last modified 2026-06-17.