Vulnerabilities CVE-2025-21418

CVE-2025-21418

Medium

Open

KEV

TLP:CLEAR

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

NVD CVE.org

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Description

Microsoft — Windows — Microsoft Windows Ancillary Function Driver for WinSock contains a heap-based buffer overflow vulnerability that allows for privilege escalation, enabling a local attacker to gain SYSTEM privileges.

Details

EPSS Score ⓘ: 1.54%

72.6th percentile
Confidence: 100%
CISA KEV
Date Added: Feb 11, 2025
Patch Due: Mar 4, 2025
Required Action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

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