CVE-2026-68820
KEVMicrosoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability
Description
Microsoft Windows Ancillary Function Driver for WinSock contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally.
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
CVSS 3.1 vector
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:HPublishedAug 11, 2026
Last modifiedOct 26, 2026
Added to KEVAug 11, 2026
Remediation dueAug 25, 2026
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68820PatchVendor Advisory
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-68820US Government Resource
0 recent articles mention this CVE
65
Risk assessment · High
Actively exploited. Patch immediately.
- Exploitation
- Confirmed in the wild (CISA KEV)
- Federal remediation deadline
- Overdue by 64 days
- CVSS
- 7.0 HIGH
- EPSS (30-day exploit probability)
- 0.33% · top 74% of all CVEs
- Weakness
- CWE-416
Recommended actions
- 1.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.
- 2.Treat as emergency change: patch or isolate internet-facing instances first.
- 3.Hunt for compromise: review logs for the disclosure window, not just from the patch date.
Assessment is derived automatically from the live signals above; verify against your own asset inventory.