Elevation of Privilege Vulnerability in Windows Ancillary Function Driver for WinSock
CVE-2026-57093

7HIGH

Key Information:

Vendor

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

What is CVE-2026-57093?

A vulnerability exists in the Windows Ancillary Function Driver for WinSock that allows an authorized attacker to elevate their privileges locally. This use after free vulnerability could potentially allow an attacker to execute arbitrary code within the system, leading to unauthorized access and control over affected systems. Organizations are encouraged to apply the latest patches and monitor their network for any unusual activities related to this issue.

Affected Version(s)

Windows 10 Version 1607 32-bit Systems 10.0.14393.0 < 10.0.14393.9339

Windows 10 Version 1809 32-bit Systems 10.0.17763.0 < 10.0.17763.9020

Windows 10 Version 21H2 32-bit Systems 10.0.19044.0 < 10.0.19044.7548

References

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

CVSS V3.1

Score:
7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
High
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.