CVE-2025-21418

HIGHCISA KEV

7.8

Description

Windows Ancillary Function Driver for WinSock Elevation of Privilege Vulnerability

CVE Details

CVSS v3.1 Score7.8

SeverityHIGH

CVSS VectorCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack VectorLOCAL

ComplexityLOW

Privileges RequiredLOW

User InteractionNONE

Published2/11/2025

Last Modified10/27/2025

Sourcekev

Honeypot Sightings0

CISA KEV

VendorMicrosoft

ProductWindows

Vulnerability NameMicrosoft Windows Ancillary Function Driver for WinSock Heap-Based Buffer Overflow Vulnerability

KEV Date Added2025-02-11

Remediation Due Date2025-03-04

Ransomware UseUnknown

Affected Products

microsoft:windows_10_1607microsoft:windows_10_1809microsoft:windows_10_21h2microsoft:windows_10_22h2microsoft:windows_11_22h2microsoft:windows_11_23h2microsoft:windows_11_24h2microsoft:windows_server_2008microsoft:windows_server_2012microsoft:windows_server_2016microsoft:windows_server_2019microsoft:windows_server_2022microsoft:windows_server_2022_23h2microsoft:windows_server_2025

Weaknesses (CWE)

CWE-122

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21418(secure@microsoft.com)

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21418(134c704f-9b21-4f2e-91b3-4a467353bcc0)

IOC Correlations

No correlations recorded

This product uses data from the NVD API but is not endorsed or certified by the NVD.