microsoft windows-server-2008 CVE-2025-21418 vulnerability in Microsoft Products
Published on February 11, 2025

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Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

Vendor Advisory NVD

Known Exploited Vulnerability

This Microsoft Windows Ancillary Function Driver for WinSock Heap-Based Buffer Overflow Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Microsoft Windows Ancillary Function Driver for WinSock contains a heap-based buffer overflow vulnerability that allows for privilege escalation, enabling a local attacker to gain SYSTEM privileges.

The following remediation steps are recommended / required by March 4, 2025: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Vulnerability Analysis

CVE-2025-21418 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. It has an exploitability score of 1.8 out of four. The potential impact of an exploit of this vulnerability is considered to be very high.


Products Associated with CVE-2025-21418

You can be notified by stack.watch whenever vulnerabilities like CVE-2025-21418 are published in these products:

Microsoft Windows Server 2008
 
Microsoft Windows Server 2012
 
Microsoft Windows Server 2016
 
Microsoft Windows Server 2019
 
Microsoft Windows Server 2022
 
Microsoft Windows 11
 
Microsoft Windows 10
 
Microsoft Windows 11 23h2
 
Microsoft Windows Server 2022 23h2
 
Microsoft Windows 11 24h2
 
Microsoft Windows Server 2025
 

What versions are vulnerable to CVE-2025-21418?