Live › vulnerability › CVE-2025-32709
Go to dashboardA use-after-free bug in the Windows Ancillary Function Driver for WinSock (afd.sys) lets a logged-in user corrupt memory in the kernel. An attacker who already has a local foothold can escalate to administrator.
Summary written from the sources below. Check the originals before acting.
First seen by InfraStack 2026-10-23 19:11 UTC, 3h before NVD. All times on this page are UTC.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
| Product | Ecosystem | Affected | Fixed in |
|---|---|---|---|
| Microsoft Windows | vendor | – | – |
| microsoft windows 10 1507 | vendor | < 10.0.10240.21014 | 10.0.10240.21014 |
| microsoft windows 10 1607 | vendor | < 10.0.14393.8066 | 10.0.14393.8066 |
| microsoft windows 10 1809 | vendor | < 10.0.17763.7314 | 10.0.17763.7314 |
| microsoft windows 10 21h2 | vendor | < 10.0.19044.5854 | 10.0.19044.5854 |
| microsoft windows 10 22h2 | vendor | < 10.0.19045.5854 | 10.0.19045.5854 |
| microsoft windows 11 22h2 | vendor | < 10.0.22621.5335 | 10.0.22621.5335 |
| microsoft windows 11 23h2 | vendor | < 10.0.22631.5335 | 10.0.22631.5335 |
| microsoft windows 11 24h2 | vendor | < 10.0.26100.3981 | 10.0.26100.3981 |
| microsoft windows server 2008 | vendor | – | – |
| microsoft windows server 2008 | vendor | = r2 | – |
| microsoft windows server 2012 | vendor | – | – |
| microsoft windows server 2012 | vendor | = r2 | – |
| microsoft windows server 2016 | vendor | < 10.0.14393.8066 | 10.0.14393.8066 |
| microsoft windows server 2019 | vendor | < 10.0.17763.7314 | 10.0.17763.7314 |
| microsoft windows server 2022 | vendor | < 10.0.20348.3692 | 10.0.20348.3692 |
| microsoft windows server 2022 23h2 | vendor | < 10.0.25398.1611 | 10.0.25398.1611 |
| microsoft windows server 2025 | vendor | < 10.0.26100.3981 | 10.0.26100.3981 |
Unknown from the sources.
Apply the Microsoft security update for CVE-2025-32709 per vendor instructions; CISA says to follow vendor mitigations or discontinue use if none are available.
Each 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 escalate privileges to administrator.
CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
This page as .md · .json · in your agent: get_signal("CVE-2025-32709")
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