CVE-2018-8589: Microsoft Win32k Privilege Escalation Vulnerability

High severity, CVSS 7.8. Actively exploited: in CISA KEV since 2022-05-23. EPSS: 3% chance of exploitation in the next 30 days.

An elevation of privilege vulnerability exists when Windows improperly handles calls to Win32k.sys, aka "Windows Win32k Elevation of Privilege Vulnerability." This affects Windows Server 2008, Windows 7, Windows Server 2008 R2.

Affected products

• Microsoft Windows 7: affected versions not specified
• Microsoft Windows Server 2008: affected versions not specified; version r2 only

Published 2018-11-14. Last modified 2026-06-17.