CVE-2021-34499: Microsoft Windows Server 2008

Medium severity, CVSS 6.5. EPSS: 2.9% chance of exploitation in the next 30 days.

Windows DNS Server Denial of Service Vulnerability

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 20h2 only; version 2004 only
• Microsoft Windows Server 2019: affected versions not specified

Published 2021-07-14. Last modified 2026-08-10.