ACTIVELY EXPLOITED
CVE-2018-8589: Microsoft Win32k Privilege Escalation Vulnerability
| Vendor | Microsoft |
|---|---|
| Product | Win32k |
| Actively exploited | Yes |
| Added to CISA KEV | 23 May 2022 |
| CISA federal deadline | 13 Jun 2022 |
Required action (CISA's text)
Apply updates per vendor instructions.
Description (NVD)
A privilege escalation vulnerability exists when Windows improperly handles calls to Win32k.sys. An attacker who successfully exploited this vulnerability could run remote code in the security context of the local system.
SOURCES
Other Microsoft flaws
- patchtuesday:2026-11: Vulnerability in Microsoft
- CVE-2026-124194: Microsoft Office Outlook Missing User Interaction for Potentially Unsafe Action Vulnerability
- CVE-2026-96951: Microsoft Windows Command Injection Vulnerability
- CVE-2026-65660: Microsoft SharePoint Code Injection Vulnerability
- CVE-2026-85880: Microsoft Windows Heap-Based Buffer Overflow Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.