Occurred Aug 11, 2026, 12:00:00 AM UTC

First published Oct 27, 2026, 8:14:15 PM UTC · Last updated Oct 27, 2026, 8:14:15 PM UTC

CVE-2026-68820: Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability

Reported by CISA Known Exploited Vulnerabilities

The source describes a Windows driver vulnerability that can allow an authorized attacker to elevate privileges locally. It calls for applying mitigations according to vendor and CISA guidance, or discontinuing use if mitigations are unavailable.

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Why it matters

The source identifies mitigation or discontinuation as required action for affected assets.

Generated scores

Scores are based on the cited reporting and use a 1–10 scale. Read the methodology.

Confidence: 6/10How certain the assessment is based on the clarity and evidence in the cited reporting.
Geographic reach: 1/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 2/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 2/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Urgency: 5/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Primary official sources

CISA Known Exploited Vulnerabilities CVE-2026-68820: Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability

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