CVE-2018-8634: Microsoft Windows 10

High severity, CVSS 8.8. EPSS: 15.4% chance of exploitation in the next 30 days.

A remote code execution vulnerability exists in Windows where Microsoft text-to-speech fails to properly handle objects in the memory, aka "Microsoft Text-To-Speech Remote Code Execution Vulnerability." This affects Windows Server 2016, Windows 10, Windows Server 2019, Windows 10 Servers.

Affected products

• Microsoft Windows 10: affected versions not specified; version 1607 only; version 1703 only; version 1709 only; version 1803 only; version 1809 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.