CVE-2026-68820
Description
Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.
How to fix
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.
CISA due date: Aug 25, 2026- microsoft windows_10_160710.0.14393.9418 or later
- microsoft windows_10_180910.0.17763.9115 or later
- microsoft windows_10_21h210.0.19044.7663 or later
- microsoft windows_10_22h210.0.19045.7663 or later
- microsoft windows_11_23h210.0.22631.7517 or later
- microsoft windows_11_24h210.0.26100.9106 or later
- microsoft windows_11_25h210.0.26200.9106 or later
- microsoft windows_11_26h110.0.28000.2704 or later
- microsoft windows_server_201610.0.14393.9418 or later
- microsoft windows_server_201910.0.17763.9115 or later
- microsoft windows_server_202210.0.20348.5440 or later
- microsoft windows_server_202510.0.26100.33222 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_10_1607 | v < 10.0.14393.9418 | 10.0.14393.9418 |
| microsoft windows_10_1809 | v < 10.0.17763.9115 | 10.0.17763.9115 |
| microsoft windows_10_21h2 | v < 10.0.19044.7663 | 10.0.19044.7663 |
| microsoft windows_10_22h2 | v < 10.0.19045.7663 | 10.0.19045.7663 |
| microsoft windows_11_23h2 | v < 10.0.22631.7517 | 10.0.22631.7517 |
| microsoft windows_11_24h2 | v < 10.0.26100.9106 | 10.0.26100.9106 |
| microsoft windows_11_25h2 | v < 10.0.26200.9106 | 10.0.26200.9106 |
| microsoft windows_11_26h1 | v < 10.0.28000.2704 | 10.0.28000.2704 |
| microsoft windows_server_2012 | No range specified, r2 | — |
| microsoft windows_server_2016 | v < 10.0.14393.9418 | 10.0.14393.9418 |
| microsoft windows_server_2019 | v < 10.0.17763.9115 | 10.0.17763.9115 |
| microsoft windows_server_2022 | v < 10.0.20348.5440 | 10.0.20348.5440 |
| microsoft windows_server_2025 | v < 10.0.26100.33222 | 10.0.26100.33222 |
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