7.0
High
Exploited
CVE-2026-68820 Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability
Active exploitation observed
· CISA KEV catalogue
Required action
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.
Ransomware campaigns
Not observed so far
Weakness
CWE-416
Description
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Windows 10 Version 1607 10.0 | 10.0.14393.0 → < 10.0.14393.9418 | 10.0.14393.9418 |
| Windows 10 Version 1809 10.0 | 10.0.17763.0 → < 10.0.17763.9121 | 10.0.17763.9121 |
| Windows 10 Version 21H2 10.0 | 10.0.19044.0 → < 10.0.19044.7663 | 10.0.19044.7663 |
| Windows 10 Version 22H2 10.0 | 10.0.19045.0 → < 10.0.19045.7663 | 10.0.19045.7663 |
| Windows 11 Version 23H2 10.0 | 10.0.22631.0 → < 10.0.22631.7517 | 10.0.22631.7517 |
| Windows 11 Version 24H2 10.0 | 10.0.26100.0 → < 10.0.26100.9168 | 10.0.26100.9168 |
| Windows 11 Version 25H2 10.0 | 10.0.26200.0 → < 10.0.26200.9168 | 10.0.26200.9168 |
| Windows 11 version 26H1 10.0 | 10.0.28000.0 → < 10.0.28000.2704 | 10.0.28000.2704 |
| Windows Server 2012 6.2 | 6.2.9200.0 → < 6.2.9200.26280 | 6.2.9200.26280 |
Show the 10 other branches Hide the 10 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| Windows Server 2012 (Server Core installation) 6.2 | 6.2.9200.0 → < 6.2.9200.26280 | 6.2.9200.26280 |
| Windows Server 2012 R2 6.3 | 6.3.9600.0 → < 6.3.9600.23338 | 6.3.9600.23338 |
| Windows Server 2012 R2 (Server Core installation) 6.3 | 6.3.9600.0 → < 6.3.9600.23338 | 6.3.9600.23338 |
| Windows Server 2016 10.0 | 10.0.14393.0 → < 10.0.14393.9418 | 10.0.14393.9418 |
| Windows Server 2016 (Server Core installation) 10.0 | 10.0.14393.0 → < 10.0.14393.9418 | 10.0.14393.9418 |
| Windows Server 2019 10.0 | 10.0.17763.0 → < 10.0.17763.9121 | 10.0.17763.9121 |
| Windows Server 2019 (Server Core installation) 10.0 | 10.0.17763.0 → < 10.0.17763.9121 | 10.0.17763.9121 |
| Windows Server 2022 10.0 | 10.0.20348.0 → < 10.0.20348.5499 | 10.0.20348.5499 |
| Windows Server 2025 10.0 | 10.0.26100.0 → < 10.0.26100.33296 | 10.0.26100.33296 |
| Windows Server 2025 (Server Core installation) 10.0 | 10.0.26100.0 → < 10.0.26100.33296 | 10.0.26100.33296 |
References
Timeline
- Published
- Added to the KEV catalogue
- Last modified
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