CVE-2025-53137
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
CVE-2025-53137 is fixed in 37 products on 1 platform, first by KB5063871, released August 12, 2025. It is not reported as exploited. Patch Radar priority: High.
High
CVSS
7.0
Important
Exploitation
None reported
Exploitation Less Likely
CISA KEV
Not listed
Not in the Known Exploited Vulnerabilities catalog
EPSS
0.0039
33rd percentile
<p>Use after free in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges locally.</p>
Where it's fixed
| Product | Fixed in | Fix | Released |
|---|---|---|---|
| Microsoft | |||
| Windows 10 Version 1607 for 32-bit Systems | 14393.8330 | KB5063871 | Aug 12, 2025 |
| Windows 10 Version 1607 for x64-based Systems | 14393.8330 | KB5063871 | Aug 12, 2025 |
| Windows 10 Version 1809 for 32-bit Systems | 17763.7678 | KB5063877 | Aug 12, 2025 |
| Windows 10 Version 1809 for x64-based Systems | 17763.7678 | KB5063877 | Aug 12, 2025 |
| Windows 10 Version 21H2 for 32-bit Systems | KB5063709 | Aug 12, 2025 | |
| Windows 10 Version 21H2 for ARM64-based Systems | KB5063709 | Aug 12, 2025 | |
| Windows 10 Version 21H2 for x64-based Systems | KB5063709 | Aug 12, 2025 | |
| Windows 10 Version 22H2 for 32-bit Systems | KB5063709 | Aug 12, 2025 | |
| Windows 10 Version 22H2 for ARM64-based Systems | KB5063709 | Aug 12, 2025 | |
| Windows 10 Version 22H2 for x64-based Systems | KB5063709 | Aug 12, 2025 | |
| Windows 10 for 32-bit Systems | 10240.21100 | KB5063889 | Aug 12, 2025 |
| Windows 10 for x64-based Systems | 10240.21100 | KB5063889 | Aug 12, 2025 |
| Windows 11 Version 22H2 for ARM64-based Systems | KB5063875 | Aug 12, 2025 | |
| Windows 11 Version 22H2 for x64-based Systems | KB5063875 | Aug 12, 2025 | |
| Windows 11 Version 23H2 for ARM64-based Systems | KB5063875 | Aug 12, 2025 | |
| Windows 11 Version 23H2 for x64-based Systems | KB5063875 | Aug 12, 2025 | |
| Windows 11 Version 24H2 for ARM64-based Systems | 26100.4946 | KB5063878 | Aug 12, 2025 |
| Windows 11 Version 24H2 for ARM64-based Systems | 26100.4851 | KB5064010 | Aug 12, 2025 |
| Windows 11 Version 24H2 for x64-based Systems | 26100.4946 | KB5063878 | Aug 12, 2025 |
| Windows 11 Version 24H2 for x64-based Systems | 26100.4851 | KB5064010 | Aug 12, 2025 |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 | KB5063927 | Aug 12, 2025 | |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 | KB5063947 | Aug 12, 2025 | |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | KB5063927 | Aug 12, 2025 | |
| Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation) | KB5063947 | Aug 12, 2025 | |
| Windows Server 2008 for 32-bit Systems Service Pack 2 | KB5063948 | Aug 12, 2025 | |
| Windows Server 2008 for 32-bit Systems Service Pack 2 | KB5063888 | Aug 12, 2025 | |
| Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | KB5063948 | Aug 12, 2025 | |
| Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation) | KB5063888 | Aug 12, 2025 | |
| Windows Server 2008 for x64-based Systems Service Pack 2 | KB5063948 | Aug 12, 2025 | |
| Windows Server 2008 for x64-based Systems Service Pack 2 | KB5063888 | Aug 12, 2025 | |
| Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | KB5063948 | Aug 12, 2025 | |
| Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation) | KB5063888 | Aug 12, 2025 | |
| Windows Server 2012 | KB5063906 | Aug 12, 2025 | |
| Windows Server 2012 (Server Core installation) | KB5063906 | Aug 12, 2025 | |
| Windows Server 2012 R2 | KB5063950 | Aug 12, 2025 | |
| Windows Server 2012 R2 (Server Core installation) | KB5063950 | Aug 12, 2025 | |
| Windows Server 2016 | 14393.8330 | KB5063871 | Aug 12, 2025 |
| Windows Server 2016 (Server Core installation) | 14393.8330 | KB5063871 | Aug 12, 2025 |
| Windows Server 2019 | 17763.7678 | KB5063877 | Aug 12, 2025 |
| Windows Server 2019 (Server Core installation) | 17763.7678 | KB5063877 | Aug 12, 2025 |
| Windows Server 2022 | 20348.4052 | KB5063880 | Aug 12, 2025 |
| Windows Server 2022 | 20348.3989 | KB5063812 | Aug 12, 2025 |
| Windows Server 2022 (Server Core installation) | 20348.4052 | KB5063880 | Aug 12, 2025 |
| Windows Server 2022 (Server Core installation) | 20348.3989 | KB5063812 | Aug 12, 2025 |
| Windows Server 2022, 23H2 Edition (Server Core installation) | 25398.1791 | KB5063899 | Aug 12, 2025 |
| Windows Server 2025 | 26100.4946 | KB5063878 | Aug 12, 2025 |
| Windows Server 2025 | 26100.4851 | KB5064010 | Aug 12, 2025 |
| Windows Server 2025 (Server Core installation) | 26100.4946 | KB5063878 | Aug 12, 2025 |
| Windows Server 2025 (Server Core installation) | 26100.4851 | KB5064010 | Aug 12, 2025 |
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