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CVE-2026-68820

HighCVSS 7.0/10Known exploited (CISA KEV)Last modified Oct 26, 2026

Description

Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

Metrics

CVSS 3.1 7.0/10CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

Affected software

Vendor	Product	Versions
Microsoft	Windows 10 Version 1607	>= 10.0.14393.0, < 10.0.14393.9418
Microsoft	Windows 10 Version 1809	>= 10.0.17763.0, < 10.0.17763.9121
Microsoft	Windows 10 Version 21H2	>= 10.0.19044.0, < 10.0.19044.7663
Microsoft	Windows 10 Version 22H2	>= 10.0.19045.0, < 10.0.19045.7663
Microsoft	Windows 11 version 23H2	>= 10.0.22631.0, < 10.0.22631.7517
Microsoft	Windows 11 Version 23H2	>= 10.0.22631.0, < 10.0.22631.7517
Microsoft	Windows 11 Version 24H2	>= 10.0.26100.0, < 10.0.26100.9168
Microsoft	Windows 11 Version 25H2	>= 10.0.26200.0, < 10.0.26200.9168
Microsoft	Windows 11 version 26H1	>= 10.0.28000.0, < 10.0.28000.2704
Microsoft	Windows Server 2012	>= 6.2.9200.0, < 6.2.9200.26280
Microsoft	Windows Server 2012 (Server Core installation)	>= 6.2.9200.0, < 6.2.9200.26280
Microsoft	Windows Server 2012 R2	>= 6.3.9600.0, < 6.3.9600.23338
Microsoft	Windows Server 2012 R2 (Server Core installation)	>= 6.3.9600.0, < 6.3.9600.23338
Microsoft	Windows Server 2016	>= 10.0.14393.0, < 10.0.14393.9418
Microsoft	Windows Server 2016 (Server Core installation)	>= 10.0.14393.0, < 10.0.14393.9418
Microsoft	Windows Server 2019	>= 10.0.17763.0, < 10.0.17763.9121
Microsoft	Windows Server 2019 (Server Core installation)	>= 10.0.17763.0, < 10.0.17763.9121
Microsoft	Windows Server 2022	>= 10.0.20348.0, < 10.0.20348.5499
Microsoft	Windows Server 2025	>= 10.0.26100.0, < 10.0.26100.33296
Microsoft	Windows Server 2025 (Server Core installation)	>= 10.0.26100.0, < 10.0.26100.33296

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-68820Patch, Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-68820US Government Resource

Timeline

Published: Aug 11, 2026
Last modified: Oct 26, 2026
Added to CISA KEV: Aug 11, 2026
NVD status: Analyzed

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