Actively exploited
Listed in CISA’s Known Exploited Vulnerabilities catalog since August 11, 2026.
CVE-2026-68820
Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability
Microsoft · Windows Ancillary Function Driver for WinSock
Added to KEV August 11, 2026
Alert details
- Source feed
- CISA KEV
- CVE ID
- CVE-2026-68820
- CWE
- CWE-416
- Affected products
- Windows Ancillary Function Driver for WinSock · Microsoft Windows Ancillary Function Driver for WinSock · Microsoft
What happened
Microsoft Windows Ancillary Function Driver for WinSock contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally.
What it means for your business
Microsoft Windows Ancillary Function Driver for WinSock is listed in CISA's Known Exploited Vulnerabilities catalog (CVE-2026-68820). Microsoft Windows Ancillary Function Driver for WinSock contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally. CISA remediation due date: 2026-08-25. If you need help checking exposure, call (864) 335-9223.
Required action
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.
CISA due date: August 25, 2026
Sources
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