Summary
Impact: Elevation of Privilege. Microsoft rating: Important. Not known to be exploited — Exploitation Less Likely. Customer action: Required.
Details
What privileges could be gained by an attacker who successfully exploited the vulnerability?
A local, authenticated attacker could gain elevated local system or administrator privileges through a vulnerability in the Win32k.sys driver.
Security updates
10.0.17763.7558 — https://support.microsoft.com/help/5062557
10.0.20348.3932 — https://support.microsoft.com/help/5062572
10.0.19044.6093 — https://support.microsoft.com/help/5062554
10.0.22621.5624 — https://support.microsoft.com/help/5062552
10.0.26100.4652 — https://support.microsoft.com/help/5062553
10.0.25398.1732 — https://support.microsoft.com/help/5062570
Vulnerabilities 1
-
High 7.8
Win32k Elevation of Privilege Vulnerability
Use after free in Windows Win32K - ICOMP allows an authorized attacker to elevate privileges locally.
Revision history
-
#2
Added an acknowledgement. This is an informational change only.
-
#1
Information published.
References
-
CVE-2025-49733 Win32k Elevation of Privilege Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-49733
-
Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
-
Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
-
Common Vulnerability Scoring System
https://www.first.org/cvss