Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Summary
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally. Published in August 2026 Security Updates. MSRC exploitability: Publicly Disclosed:No;Exploited:No;Latest Software Release:Exploitation More Likely.
Why it matters
Microsoft published this item through its Security Update Guide, making it part of Patch Tuesday triage for affected Windows, cloud, or application estates.
Operator check
Review the Microsoft Security Update Guide entry for CVE-2026-61348. Confirm whether Windows Ancillary Function Driver for WinSock is deployed, then apply the current security update or documented mitigation. CVSS score: 7.0.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.