CVE-2025-21418
HIGH CISA KEV EPSS 70.3%
Published Feb 11, 20251y ago · Modified Jun 17, 20261w ago
7.8 CVSS 3.1
Published Feb 11, 2025 1y ago
Last Modified Jun 17, 2026 1w ago
KEV Listed Feb 11, 2025 1y ago
KEV Due Mar 4, 2025 483d overdue
Description
Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Attack Vector Local
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality High
Integrity High
Availability High
Threat Intelligence
CISA Known Exploited Overdue 483d
- Added
- Feb 11, 2025
- Due
- Mar 4, 2025
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
EPSS Exploit Probability
70.3% percentile
Exploit & Patch Status
Actively Exploited (KEV)
Patch Available
Weaknesses 1
CWE-122
Affected Products 18
| Vendor | Product | Version | Range |
|---|---|---|---|
| microsoft | windows_10_1607 | * | <10.0.10240.20915 |
| microsoft | windows_10_1607 | * | <10.0.10240.20915 |
| microsoft | windows_10_1809 | * | <10.0.17763.6893 |
| microsoft | windows_10_1809 | * | <10.0.17763.6893 |
| microsoft | windows_10_21h2 | * | <10.0.19044.5487 |
| microsoft | windows_10_22h2 | * | <10.0.19045.5487 |
| microsoft | windows_11_22h2 | * | <10.0.22621.4890 |
| microsoft | windows_11_23h2 | * | <10.0.22631.4890 |
| microsoft | windows_11_24h2 | * | <10.0.26100.3107 |
| microsoft | windows_server_2008 | * | any |
| microsoft | windows_server_2008 | r2 | any |
| microsoft | windows_server_2012 | * | any |
| microsoft | windows_server_2012 | r2 | any |
| microsoft | windows_server_2016 | * | <10.0.14393.7785 |
| microsoft | windows_server_2019 | * | <10.0.17763.6893 |
| microsoft | windows_server_2022 | * | <10.0.20348.3148 |
| microsoft | windows_server_2022_23h2 | * | <10.0.25398.1425 |
| microsoft | windows_server_2025 | * | <10.0.26100.3107 |
References 2
- msrc.microsoft.com https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21418
- cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21418
Remediation
- msrc.microsoft.com https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21418