Live › vulnerability › CVE-2026-68820
Go to dashboardUse-after-free (race) in afd.sys lets a local low-privilege user reach SYSTEM. Microsoft marks it Exploitation Detected. KernelSight reports Lazarus used it as a zero-day (Operation Dream Job, deploying FudModule v3.1) for about five weeks before the 11 Aug 2026 patch. It needs a foothold first and cannot be reached remotely. No public PoC.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 5h before NVD. All times on this page are UTC.
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.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Microsoft Windows Ancillary Function Driver for WinSock | vendor | – | – |
| Windows Ancillary Function Driver for WinSock (afd.sys) | vendor | Windows builds below fixed build: 26100 < 26100.9168; 26200 < 26200.9168; 28000 < 28000.2704; 22631 < 22631.7517; 19044/19045 < 19044.7663/19045.7663; 17763 < 17763.9121; 14393 < 14393.9418; 20348 < 20348.5499; 6.3.9600 < 6.3.9600.23338; 6.2.9200 < 6.2.9200.26280 | 26100.9168, 26200.9168, 28000.2704, 22631.7517, 19044.7663, 19045.7663, 17763.9121, 14393.9418, 20348.5499, 6.3.9600.23338, 6.2.9200.26280 |
| microsoft windows 10 1607 |
| vendor |
| < 10.0.14393.9418 |
| 10.0.14393.9418 |
| microsoft windows 10 1809 | vendor | < 10.0.17763.9115 | 10.0.17763.9115 |
| microsoft windows 10 21h2 | vendor | < 10.0.19044.7663 | 10.0.19044.7663 |
| microsoft windows 10 22h2 | vendor | < 10.0.19045.7663 | 10.0.19045.7663 |
| microsoft windows 11 23h2 | vendor | < 10.0.22631.7517 | 10.0.22631.7517 |
| microsoft windows 11 24h2 | vendor | < 10.0.26100.9106 | 10.0.26100.9106 |
| microsoft windows 11 25h2 | vendor | < 10.0.26200.9106 | 10.0.26200.9106 |
| microsoft windows 11 26h1 | vendor | < 10.0.28000.2704 | 10.0.28000.2704 |
| microsoft windows server 2012 | vendor | – | – |
| microsoft windows server 2012 | vendor | = r2 | – |
| microsoft windows server 2016 | vendor | < 10.0.14393.9418 | 10.0.14393.9418 |
| microsoft windows server 2019 | vendor | < 10.0.17763.9115 | 10.0.17763.9115 |
| microsoft windows server 2022 | vendor | < 10.0.20348.5440 | 10.0.20348.5440 |
| microsoft windows server 2025 | vendor | < 10.0.26100.33222 | 10.0.26100.33222 |
10.0.28000.2704, 10.0.22631.7517, 10.0.19044.7663 and 10.0.19045.7663, 10.0.17763.9121, 10.0.14393.9418, 10.0.20348.5499, 6.3.9600.23338, 6.2.9200.26280Each row is the first time that source carried this signal. The analyst’s rows are its own findings.
Microsoft Windows Ancillary Function Driver for WinSock contains a use-after-free vulnerability that allows an authorized attacker to elevate privileges locally.
CISA 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.
This page as .md · .json · in your agent: get_signal("CVE-2026-68820")
CISA KEV catalog, Creative Commons 0 · NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.