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CVE-2026-68820Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
7.0 HIGHEPSS 8.56%⚡ Known Exploited (CISA KEV)NVD: Analyzed
Overview
Severity
| Score | Severity | Version | Vector String |
|---|---|---|---|
| 7.0 | HIGH | 3.1microsoft (CNA) | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H |
| 7.0 | HIGH | 3.1microsoft (CNA) | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C |
CISA required action
⚡ Known exploited · remediation due Aug 25, 2026
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.
Details
- CVE ID
- CVE-2026-68820
- Status
- Analyzed
- Assigner (CNA)
- microsoft
- Published
- Aug 11, 2026
- Last modified
- 2026-10-30 17:21 UTC
- Weaknesses
- CWE-416 · Use After Free
Affected Products
As published by the CNA in the CVE record.
MicrosoftWindows 10 Version 16071 version range
- 10.0.14393.0 before 10.0.14393.9418
MicrosoftWindows 10 Version 18091 version range
- 10.0.17763.0 before 10.0.17763.9121
MicrosoftWindows 10 Version 21H21 version range
- 10.0.19044.0 before 10.0.19044.7663
MicrosoftWindows 10 Version 22H21 version range
- 10.0.19045.0 before 10.0.19045.7663
MicrosoftWindows 11 version 23H21 version range
- 10.0.22631.0 before 10.0.22631.7517
MicrosoftWindows 11 Version 23H21 version range
- 10.0.22631.0 before 10.0.22631.7517
MicrosoftWindows 11 Version 24H21 version range
- 10.0.26100.0 before 10.0.26100.9168
MicrosoftWindows 11 Version 25H21 version range
- 10.0.26200.0 before 10.0.26200.9168
MicrosoftWindows 11 version 26H11 version range
- 10.0.28000.0 before 10.0.28000.2704
MicrosoftWindows Server 20121 version range
- 6.2.9200.0 before 6.2.9200.26280
MicrosoftWindows Server 2012 (Server Core installation)1 version range
- 6.2.9200.0 before 6.2.9200.26280
MicrosoftWindows Server 2012 R21 version range
- 6.3.9600.0 before 6.3.9600.23338
MicrosoftWindows Server 2012 R2 (Server Core installation)1 version range
- 6.3.9600.0 before 6.3.9600.23338
MicrosoftWindows Server 20161 version range
- 10.0.14393.0 before 10.0.14393.9418
MicrosoftWindows Server 2016 (Server Core installation)1 version range
- 10.0.14393.0 before 10.0.14393.9418
MicrosoftWindows Server 20191 version range
- 10.0.17763.0 before 10.0.17763.9121
MicrosoftWindows Server 2019 (Server Core installation)1 version range
- 10.0.17763.0 before 10.0.17763.9121
MicrosoftWindows Server 20221 version range
- 10.0.20348.0 before 10.0.20348.5499
MicrosoftWindows Server 20251 version range
- 10.0.26100.0 before 10.0.26100.33296
MicrosoftWindows Server 2025 (Server Core installation)1 version range
- 10.0.26100.0 before 10.0.26100.33296