CVE-2018-8626: Microsoft Windows 10

Critical severity, CVSS 9.8. EPSS: 21.2% chance of exploitation in the next 30 days.

A remote code execution vulnerability exists in Windows Domain Name System (DNS) servers when they fail to properly handle requests, aka "Windows DNS Server Heap Overflow Vulnerability." This affects Windows Server 2012 R2, Windows Server 2019, Windows Server 2016, Windows 10, Windows 10 Servers.

Affected products

• Microsoft Windows 10: version 1607 only; version 1709 only; version 1803 only; version 1809 only
• Microsoft Windows Server 2012: version r2 only
• Microsoft Windows Server 2016: affected versions not specified; version 1709 only; version 1803 only
• Microsoft Windows Server 2019: affected versions not specified

Published 2018-12-12. Last modified 2026-06-17.