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7.8 High Exploited

CVE-2025-32709 Microsoft Windows Ancillary Function Driver for WinSock Use-After-Free Vulnerability

Active exploitation observed

· CISA KEV catalogue
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.
Ransomware campaigns Not observed so far
Weakness CWE-416

Description

Null pointer dereference 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 1809 10.0 10.0.17763.0 → < 10.0.17763.7314 10.0.17763.7314
Windows Server 2019 10.0 10.0.17763.0 → < 10.0.17763.7314 10.0.17763.7314
Windows Server 2019 (Server Core installation) 10.0 10.0.17763.0 → < 10.0.17763.7314 10.0.17763.7314
Windows Server 2022 10.0 10.0.20348.0 → < 10.0.20348.3692 10.0.20348.3692
Windows 10 Version 21H2 10.0 10.0.19044.0 → < 10.0.19044.5854 10.0.19044.5854
Windows 11 version 22H2 10.0 10.0.22621.0 → < 10.0.22621.5335 10.0.22621.5335
Windows 10 Version 22H2 10.0 10.0.19045.0 → < 10.0.19045.5854 10.0.19045.5854
Windows Server 2025 (Server Core installation) 10.0 10.0.26100.0 → < 10.0.26100.4061 10.0.26100.4061
Windows 11 version 22H3 10.0 10.0.22631.0 → < 10.0.22631.5335 10.0.22631.5335
Show the 17 other branches
Product Affected versions Fixed in
Windows 11 Version 23H2 10.0 10.0.22631.0 → < 10.0.22631.5335 10.0.22631.5335
Windows Server 2022, 23H2 Edition (Server Core installation) 10.0 10.0.25398.0 → < 10.0.25398.1611 10.0.25398.1611
Windows 11 Version 24H2 10.0 10.0.26100.0 → < 10.0.26100.4061 10.0.26100.4061
Windows Server 2025 10.0 10.0.26100.0 → < 10.0.26100.4061 10.0.26100.4061
Windows 10 Version 1507 10.0 10.0.10240.0 → < 10.0.10240.21014 10.0.10240.21014
Windows 10 Version 1607 10.0 10.0.14393.0 → < 10.0.14393.8066 10.0.14393.8066
Windows Server 2016 10.0 10.0.14393.0 → < 10.0.14393.8066 10.0.14393.8066
Windows Server 2016 (Server Core installation) 10.0 10.0.14393.0 → < 10.0.14393.8066 10.0.14393.8066
Windows Server 2008 Service Pack 2 6.0 6.0.6003.0 → < 6.0.6003.23317 6.0.6003.23317
Windows Server 2008 Service Pack 2 (Server Core installation) 6.0 6.0.6003.0 → < 6.0.6003.23317 6.0.6003.23317
Windows Server 2008 Service Pack 2 6.0 6.0.6003.0 → < 6.0.6003.23317 6.0.6003.23317
Windows Server 2008 R2 Service Pack 1 6.1 6.1.7601.0 → < 6.1.7601.27730 6.1.7601.27730
Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1 6.1.7601.0 → < 6.1.7601.27730 6.1.7601.27730
Windows Server 2012 6.2 6.2.9200.0 → < 6.2.9200.25475 6.2.9200.25475
Windows Server 2012 (Server Core installation) 6.2 6.2.9200.0 → < 6.2.9200.25475 6.2.9200.25475
Windows Server 2012 R2 6.3 6.3.9600.0 → < 6.3.9600.22577 6.3.9600.22577
Windows Server 2012 R2 (Server Core installation) 6.3 6.3.9600.0 → < 6.3.9600.22577 6.3.9600.22577

References

Timeline

  1. Published
  2. Added to the KEV catalogue
  3. Last modified

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