Privilege Elevation Vulnerability in Windows Ancillary Function Driver by Microsoft
CVE-2026-25176

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 1607
Windows 10 Version 1809
Windows 10 Version 21h2
Windows 10 Version 22h2
Vendor
CVE Published:
10 March 2026

What is CVE-2026-25176?

An improper access control vulnerability in the Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate their privileges locally. This flaw could potentially enable attackers to execute arbitrary code with elevated privileges, allowing them to gain unauthorized access to sensitive system resources and perform malicious actions. It is crucial for users to apply the necessary patches and mitigations to safeguard their systems against exploitation.

Affected Version(s)

Windows 10 Version 1607 32-bit Systems 10.0.14393.0 < 10.0.14393.8957

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.8511

Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.7058

References

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

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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