CVE-2025-21418
HighActively exploited (CISA KEV)
Description
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
SeverityHigh
CVSS7.8
Exploit probability—
Product
Microsoft Windows
PublishedFeb 11, 2025
First seenFeb 11, 2025
Added to KEVFeb 11, 2025
Weakness typeCWE-122CWE-122
How to fix
CISA required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
CISA due date: Mar 4, 2025Update
- microsoft windows_10_160710.0.10240.20915 or later
- microsoft windows_10_180910.0.17763.6893 or later
- microsoft windows_10_21h210.0.19044.5487 or later
- microsoft windows_10_22h210.0.19045.5487 or later
- microsoft windows_11_22h210.0.22621.4890 or later
- microsoft windows_11_23h210.0.22631.4890 or later
- microsoft windows_11_24h210.0.26100.3107 or later
- microsoft windows_server_201610.0.14393.7785 or later
- microsoft windows_server_201910.0.17763.6893 or later
- microsoft windows_server_202210.0.20348.3148 or later
- microsoft windows_server_2022_23h210.0.25398.1425 or later
- microsoft windows_server_202510.0.26100.3107 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft windows_10_1607 | v < 10.0.10240.20915 | 10.0.10240.20915 |
| microsoft windows_10_1809 | v < 10.0.17763.6893 | 10.0.17763.6893 |
| microsoft windows_10_21h2 | v < 10.0.19044.5487 | 10.0.19044.5487 |
| microsoft windows_10_22h2 | v < 10.0.19045.5487 | 10.0.19045.5487 |
| microsoft windows_11_22h2 | v < 10.0.22621.4890 | 10.0.22621.4890 |
| microsoft windows_11_23h2 | v < 10.0.22631.4890 | 10.0.22631.4890 |
| microsoft windows_11_24h2 | v < 10.0.26100.3107 | 10.0.26100.3107 |
| microsoft windows_server_2008 | No range specified, r2 | — |
| microsoft windows_server_2012 | No range specified, r2 | — |
| microsoft windows_server_2016 | v < 10.0.14393.7785 | 10.0.14393.7785 |
| microsoft windows_server_2019 | v < 10.0.17763.6893 | 10.0.17763.6893 |
| microsoft windows_server_2022 | v < 10.0.20348.3148 | 10.0.20348.3148 |
| microsoft windows_server_2022_23h2 | v < 10.0.25398.1425 | 10.0.25398.1425 |
| microsoft windows_server_2025 | v < 10.0.26100.3107 | 10.0.26100.3107 |
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