Microsoft Windows Ancillary Function Driver for WinSock: Use-After-Free Vulnerability
What to do: Run Windows Update and restart the PC.
- Affects
- Microsoft Windows Ancillary Function Driver for WinSock
- Identifier
- CVE-2026-68820
- What it is
- Microsoft Windows Ancillary Function Driver for WinSock contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally.
- Official guidance
- Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.