Null Pointer Dereference Vulnerability in Windows Ancillary Function Driver by Microsoft
CVE-2025-53141

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:
12 August 2025

What is CVE-2025-53141?

A null pointer dereference flaw exists in the Windows Ancillary Function Driver for WinSock. This vulnerability can be exploited by an authorized attacker to elevate local privileges, potentially allowing them to execute arbitrary code with elevated permissions. Ensuring that systems are updated and patches are applied can mitigate the risks associated with this vulnerability.

Affected Version(s)

Windows 10 Version 1507 32-bit Systems 10.0.10240.0 < 10.0.10240.21100

Windows 10 Version 1607 32-bit Systems 10.0.14393.0 < 10.0.14393.8330

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.7678

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

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CVE-2025-53141 : Null Pointer Dereference Vulnerability in Windows Ancillary Function Driver by Microsoft