CVE-2025-32709: Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability
First published: Tue May 13 2025(Updated: )
<p>Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.</p>
Credit: secure@microsoft.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Windows 10 | =21H2 | |
| Microsoft Windows Server 2022 23H2 | ||
| Windows 11 | =22H2 | |
| Windows 10 | =1809 | |
| Microsoft Windows Server | ||
| Windows 11 | =24H2 | |
| Windows 10 | ||
| Microsoft Windows Server 2016 | ||
| Microsoft Windows Server 2022 | ||
| Windows 10 | =1607 | |
| Microsoft Windows Server 2025 | ||
| Windows 10 | ||
| Windows 10 | =1607 | |
| Microsoft Windows Server 2025 | ||
| Microsoft Windows Server 2019 | ||
| Windows 10 | =22H2 | |
| Windows 10 | =1809 | |
| Windows 11 | =23H2 | |
| Windows 10 | =22H2 | |
| Microsoft Windows Server 2012 R2 | ||
| Windows 10 | =22H2 | |
| Windows 11 | =23H2 | |
| Microsoft Windows Server 2019 | ||
| Microsoft Windows Server 2022 | ||
| Windows 11 | =24H2 | |
| Windows 10 | =21H2 | |
| Microsoft Windows Server 2016 | ||
| Windows 11 | =22H2 | |
| Microsoft Windows Server | ||
| Windows 10 | =21H2 | |
| Microsoft Windows Server 2012 R2 | ||
| Microsoft Windows Operating System | ||
| Microsoft Windows Server 2008 R2 | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server | ||
| Microsoft Windows Server 2008 R2 | ||
| Microsoft Windows 10 | <10.0.10240.21014 | |
| Microsoft Windows 10 | <10.0.14393.8066 | |
| Microsoft Windows 10 | <10.0.17763.7314 | |
| Microsoft Windows 10 | <10.0.17763.7314 | |
| Microsoft Windows 10 | <10.0.19044.5854 | |
| Microsoft Windows 10 | <10.0.19045.5854 | |
| Windows 11 | <10.0.22621.5335 | |
| Windows 11 | <10.0.22631.5335 | |
| Windows 11 | <10.0.26100.4061 | |
| Microsoft Windows Server | ||
| Microsoft Windows Server | =r2 | |
| Microsoft Windows Server 2016 | <10.0.14393.8066 | |
| Microsoft Windows Server 2019 | <10.0.17763.7314 | |
| Microsoft Windows Server 2022 | <10.0.20348.3692 | |
| Microsoft Windows Server 2022 | <10.0.25398.1611 | |
| Microsoft Windows Server 2025 | <10.0.26100.4061 | |
Remedy
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
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Reference Links
Frequently Asked Questions
What is the severity of CVE-2025-32709?
CVE-2025-32709 is classified as a privilege escalation vulnerability.
How do I fix CVE-2025-32709?
To fix CVE-2025-32709, you should apply the latest security patches provided by Microsoft for your affected system.
What systems are affected by CVE-2025-32709?
CVE-2025-32709 affects various versions of Microsoft Windows including Windows 10, Windows 11, and Windows Server products.
Can exploiting CVE-2025-32709 lead to unauthorized access?
Yes, exploiting CVE-2025-32709 may allow an authorized attacker to elevate privileges locally, potentially leading to unauthorized access.
What is the mechanism behind CVE-2025-32709?
CVE-2025-32709 is a use-after-free vulnerability in the Windows Ancillary Function Driver for WinSock.
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