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Vulnerability · Published Nov 11, 2025 · Assigned by microsoft

CVE-2025-62217Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

High 7.0

In plain English

A high-severity race condition in Windows 10 Version 1607 from Microsoft. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 19% of all known vulnerabilities).

Severity (CVSS 3.1)7.0High
Exploit odds (30 days)0.3%top 81.0% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known

Official description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.

Affected products (as reported)

VendorProductVersions
Microsoft Windows 10 Version 1607 10.0.14393.0 – before 10.0.14393.8594
Microsoft Windows 10 Version 1809 10.0.17763.0 – before 10.0.17763.8027
Microsoft Windows 10 Version 21H2 10.0.19044.0 – before 10.0.19044.6575
Microsoft Windows 10 Version 22H2 10.0.19045.0 – before 10.0.19045.6575
Microsoft Windows 11 version 22H3 10.0.22631.0 – before 10.0.22631.6199
Microsoft Windows 11 Version 23H2 10.0.22631.0 – before 10.0.22631.6199
Microsoft Windows 11 Version 24H2 10.0.26100.0 – before 10.0.26100.7171
Microsoft Windows 11 Version 25H2 10.0.26200.0 – before 10.0.26200.7171
Microsoft Windows Server 2008 R2 Service Pack 1 6.1.7601.0 – before 6.1.7601.28021
Microsoft Windows Server 2008 R2 Service Pack 1 (Server Core installation) 6.1.7601.0 – before 6.1.7601.28021
Microsoft Windows Server 2008 Service Pack 2 6.0.6003.0 – before 6.0.6003.23624
Microsoft Windows Server 2008 Service Pack 2 (Server Core installation) 6.0.6003.0 – before 6.0.6003.23624
Microsoft Windows Server 2012 6.2.9200.0 – before 6.2.9200.25768
Microsoft Windows Server 2012 (Server Core installation) 6.2.9200.0 – before 6.2.9200.25768
Microsoft Windows Server 2012 R2 6.3.9600.0 – before 6.3.9600.22869
Microsoft Windows Server 2012 R2 (Server Core installation) 6.3.9600.0 – before 6.3.9600.22869
Microsoft Windows Server 2016 10.0.14393.0 – before 10.0.14393.8594
Microsoft Windows Server 2016 (Server Core installation) 10.0.14393.0 – before 10.0.14393.8594
Microsoft Windows Server 2019 10.0.17763.0 – before 10.0.17763.8027
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0 – before 10.0.17763.8027
Microsoft Windows Server 2022 10.0.20348.0 – before 10.0.20348.4405
Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.0 – before 10.0.25398.1965
Microsoft Windows Server 2025 10.0.26100.0 – before 10.0.26100.7171
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0 – before 10.0.26100.7171

Weakness: CWE-362 · Vector: CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

References