CVE-2018-8399: Microsoft Windows 10

High severity, CVSS 7.0. EPSS: 1.1% chance of exploitation in the next 30 days.

An elevation of privilege vulnerability exists in Windows when the Win32k component fails to properly handle objects in memory, aka "Win32k Elevation of Privilege Vulnerability." This affects Windows 10 Servers, Windows 10. This CVE ID is unique from CVE-2018-8404.

Affected products

• Microsoft Windows 10: version 1703 only; version 1709 only; version 1803 only
• Microsoft Windows Server: version 1709 only; version 1803 only

Published 2018-08-15. Last modified 2026-06-17.