Privilege Escalation Vulnerability in Windows Win32K Component
CVE-2025-49733

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 1809
Windows Server 2019
Windows Server 2019 (server Core Installation)
Windows Server 2022
Vendor
CVE Published:
8 July 2025

What is CVE-2025-49733?

The vulnerability in the Windows Win32K component pertains to a use-after-free flaw that can potentially allow an authorized attacker to elevate their local privileges. This security issue arises due to improper handling of memory, which, if exploited, could provide malicious entities with elevated access to the system. Ensuring systems are updated and protected against this vulnerability is critical for maintaining the integrity of user privileges.

Affected Version(s)

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.7558

Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.6093

Windows 10 Version 22H2 x64-based Systems 10.0.19045.0 < 10.0.19045.6093

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE...
vendor-advisory

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2025-49733 : Privilege Escalation Vulnerability in Windows Win32K Component