CVE Watch—

CVE-2025-21418

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

CVSS

—

Sin CVSS

EPSS

1.5%

p72

KEV

SÍ

11 feb 2025

Exploit Today

0-100

Publicado: — · Última mod.: —

EPSS · 30d

1.5%EPSS · 30 días1.5%

2026-06-302026-07-17

Ficha del catálogo KEV

Producto

Microsoft / Windows

Vulnerabilidad

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

Añadido a KEV

11 feb 2025

Remediar antes de

4 mar 2025

Uso conocido en ransomware

Descripción resumida

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.

Acción requerida

Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Notas

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21418 ; https://nvd.nist.gov/vuln/detail/CVE-2025-21418

CVEs relacionados

CVECVSSEPSSKEVRExplotTítuloVis.

CVE-2025-59287—

100.0%

KEV—80Microsoft Windows Server Update Service (WSUS) Deserialization of Untrusted Data Vulnerability—CVE-2021-34527—

100.0%

KEV—80Microsoft Windows Print Spooler Remote Code Execution Vulnerability—CVE-2023-36884—

99.9%

KEV—80Microsoft Windows Search Remote Code Execution Vulnerability—CVE-2022-30190—

99.9%

KEV—80Microsoft Windows Support Diagnostic Tool (MSDT) Remote Code Execution Vulnerability—CVE-2008-4250—

99.9%

KEV—80Microsoft Windows Buffer Overflow Vulnerability—CVE-2024-21412—

99.9%

KEV—80Microsoft Windows Internet Shortcut Files Security Feature Bypass Vulnerability—