All vulnerabilities
CVE-2025-32709

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

Microsoft WindowsOperating systems
Open in ThreatlineRecord JSON
CVSS
7.8High
ExploitationExploited in the wildAdded to KEV 13 May 2025CISA KEV
Exploit odds (EPSS)1.82%Chance of exploitation activity in the next 30 days, higher than 78% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in10.0.10240.21014Also 10.0.14393.8066, 10.0.17763.7314 and 11 moreCVE List
Federal deadline3 Jun 2025Remediation due date for US federal agenciesCISA KEV
CISA required actionApply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. CISA KEV

What fixes it

  • 10.0.10240.21014Windows 10 Version 1507CVE List
  • 10.0.14393.8066Windows 10 Version 1607CVE List
  • 10.0.17763.7314Windows 10 Version 1809CVE List
  • 10.0.19044.5854Windows 10 Version 21H2CVE List
  • 10.0.19045.5854Windows 10 Version 22H2CVE List
  • 10.0.22621.5335Windows 11 version 22H2CVE List
Show all 25 fixed versions
  • 10.0.22631.5335Windows 11 version 22H3CVE List
  • 10.0.22631.5335Windows 11 Version 23H2CVE List
  • 10.0.26100.4061Windows 11 Version 24H2CVE List
  • 6.1.7601.27730Windows Server 2008 R2 Service Pack 1CVE List
  • 6.1.7601.27730Windows Server 2008 R2 Service Pack 1 (Server Core installation)CVE List
  • 6.0.6003.23317Windows Server 2008 Service Pack 2CVE List
  • 6.0.6003.23317Windows Server 2008 Service Pack 2 (Server Core installation)CVE List
  • 6.2.9200.25475Windows Server 2012CVE List
  • 6.2.9200.25475Windows Server 2012 (Server Core installation)CVE List
  • 6.3.9600.22577Windows Server 2012 R2CVE List
  • 6.3.9600.22577Windows Server 2012 R2 (Server Core installation)CVE List
  • 10.0.14393.8066Windows Server 2016CVE List
  • 10.0.14393.8066Windows Server 2016 (Server Core installation)CVE List
  • 10.0.17763.7314Windows Server 2019CVE List
  • 10.0.17763.7314Windows Server 2019 (Server Core installation)CVE List
  • 10.0.20348.3692Windows Server 2022CVE List
  • 10.0.25398.1611Windows Server 2022, 23H2 Edition (Server Core installation)CVE List
  • 10.0.26100.4061Windows Server 2025CVE List
  • 10.0.26100.4061Windows Server 2025 (Server Core installation)CVE List

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Timeline

  1. 13 May 2025Added to CISA KEVCISA KEV
  2. 13 May 2025, 16:58 UTCPublishedCVE List

Description

Microsoft Windows Ancillary Function Driver for WinSock contains a use-after-free vulnerability that allows an authorized attacker to escalate privileges to administrator.

Text from CVE List

Affected versions 25

  • Windows 10 Version 1507affected: 10.0.10240.0 before 10.0.10240.21014CVE List
  • Windows 10 Version 1607affected: 10.0.14393.0 before 10.0.14393.8066CVE List
  • Windows 10 Version 1809affected: 10.0.17763.0 before 10.0.17763.7314CVE List
  • Windows 10 Version 21H2affected: 10.0.19044.0 before 10.0.19044.5854CVE List
  • Windows 10 Version 22H2affected: 10.0.19045.0 before 10.0.19045.5854CVE List
  • Windows 11 version 22H2affected: 10.0.22621.0 before 10.0.22621.5335CVE List
  • Windows 11 version 22H3affected: 10.0.22631.0 before 10.0.22631.5335CVE List
  • Windows 11 Version 23H2affected: 10.0.22631.0 before 10.0.22631.5335CVE List
  • Windows 11 Version 24H2affected: 10.0.26100.0 before 10.0.26100.4061CVE List
  • Windows Server 2008 R2 Service Pack 1affected: 6.1.7601.0 before 6.1.7601.27730CVE List
  • Windows Server 2008 R2 Service Pack 1 (Server Core installation)affected: 6.1.7601.0 before 6.1.7601.27730CVE List
  • Windows Server 2008 Service Pack 2affected: 6.0.6003.0 before 6.0.6003.23317CVE List
  • Windows Server 2008 Service Pack 2 (Server Core installation)affected: 6.0.6003.0 before 6.0.6003.23317CVE List
  • Windows Server 2012affected: 6.2.9200.0 before 6.2.9200.25475CVE List
  • Windows Server 2012 (Server Core installation)affected: 6.2.9200.0 before 6.2.9200.25475CVE List
  • Windows Server 2012 R2affected: 6.3.9600.0 before 6.3.9600.22577CVE List
  • Windows Server 2012 R2 (Server Core installation)affected: 6.3.9600.0 before 6.3.9600.22577CVE List
  • Windows Server 2016affected: 10.0.14393.0 before 10.0.14393.8066CVE List
  • Windows Server 2016 (Server Core installation)affected: 10.0.14393.0 before 10.0.14393.8066CVE List
  • Windows Server 2019affected: 10.0.17763.0 before 10.0.17763.7314CVE List
  • Windows Server 2019 (Server Core installation)affected: 10.0.17763.0 before 10.0.17763.7314CVE List
  • Windows Server 2022affected: 10.0.20348.0 before 10.0.20348.3692CVE List
  • Windows Server 2022, 23H2 Edition (Server Core installation)affected: 10.0.25398.0 before 10.0.25398.1611CVE List
  • Windows Server 2025affected: 10.0.26100.0 before 10.0.26100.4061CVE List
  • Windows Server 2025 (Server Core installation)affected: 10.0.26100.0 before 10.0.26100.4061CVE List

References 4