ACTIVELY EXPLOITED

CVE-2023-29336: Microsoft Win32K Privilege Escalation Vulnerability

Facts
VendorMicrosoft
ProductWin32k
Actively exploitedYes
Added to CISA KEV9 May 2023
CISA federal deadline30 May 2023
Weakness (CWE)CWE-416

Required action (CISA's text)

Apply updates per vendor instructions.

Description (NVD)

Microsoft Win32k contains an unspecified vulnerability that allows for privilege escalation up to SYSTEM privileges.

SOURCES

Other Microsoft flaws

Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.