Vulnerability Intelligence Report
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
CVE-2026-68820
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
CISA KEV
SSVC: Active Exploitation
CVSS Base Score
7.0
HIGH
Exploitability:1.1
Impact Score:5.9
EPSS Probability:6.18%
Executive Threat Verdict
Evaluating...
Evaluating Threat Landscape...
Assessing known weaponization, exploitation telemetry, and federal advisories.
Attack Surface
—
Authentication
—
Weaponization
—
SSVC Action
—
Weaknesses (CWE)
CWE-416 ↗CWE-416: Use After Free
Affected Products & Versions
| Vendor | Product | Affected Versions |
|---|---|---|
| Microsoft | Windows 10 Version 1607 | 10.0.14393.0 < 10.0.14393.9418 (affected) |
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 < 10.0.17763.9121 (affected) |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 < 10.0.19044.7663 (affected) |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 < 10.0.19045.7663 (affected) |
| Microsoft | Windows 11 version 23H2 | 10.0.22631.0 < 10.0.22631.7517 (affected) |
| Microsoft | Windows 11 Version 23H2 | 10.0.22631.0 < 10.0.22631.7517 (affected) |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 < 10.0.26100.9168 (affected) |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 < 10.0.26200.9168 (affected) |
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0 < 10.0.28000.2704 (affected) |
| Microsoft | Windows Server 2012 | 6.2.9200.0 < 6.2.9200.26280 (affected) |
| Microsoft | Windows Server 2012 (Server Core installation) | 6.2.9200.0 < 6.2.9200.26280 (affected) |
| Microsoft | Windows Server 2012 R2 | 6.3.9600.0 < 6.3.9600.23338 (affected) |
| Microsoft | Windows Server 2012 R2 (Server Core installation) | 6.3.9600.0 < 6.3.9600.23338 (affected) |
| Microsoft | Windows Server 2016 | 10.0.14393.0 < 10.0.14393.9418 (affected) |
| Microsoft | Windows Server 2016 (Server Core installation) | 10.0.14393.0 < 10.0.14393.9418 (affected) |
| Microsoft | Windows Server 2019 | 10.0.17763.0 < 10.0.17763.9121 (affected) |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 < 10.0.17763.9121 (affected) |
| Microsoft | Windows Server 2022 | 10.0.20348.0 < 10.0.20348.5499 (affected) |
| Microsoft | Windows Server 2025 | 10.0.26100.0 < 10.0.26100.33296 (affected) |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 < 10.0.26100.33296 (affected) |
References & Technical Advisories
No reference links found.
Threat Intelligence Signals
Identity & Timeline
| Status | PUBLISHED |
| Assigning Authority | Microsoft Corporation · Vendor · USA |
| Reserved | 2026-07-31T16:41:44 |
| Published | 2026-08-11T17:05:15 |
| Patch Date | 2026-08-11 |
| Last Updated | 2026-09-16T16:24:42 |
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