External Control of File Name Vulnerability in Windows Ancillary Function Driver
CVE-2026-41088

7.8HIGH

Key Information:

Vendor

Microsoft
Status
Windows 10 Version 21h2
Windows 10 Version 22h2
Windows 11 Version 22h3
Windows 11 Version 23h2
Vendor
CVE Published:
12 May 2026

What is CVE-2026-41088?

A vulnerability exists within the Windows Ancillary Function Driver for WinSock that permits an authorized attacker to manipulate the file name or path, leading to potential elevation of privileges on the affected system. This could allow the attacker to gain unauthorized access or control over certain system functionalities, enhancing their capabilities within the system.

Affected Version(s)

Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.7291

Windows 10 Version 22H2 32-bit Systems 10.0.19045.0 < 10.0.19045.7291

Windows 11 version 22H3 ARM64-based Systems 10.0.22631.0 < 10.0.22631.7079

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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