CVE-2025-21418: Microsoft Windows Ancillary Function Driver for WinSock Heap-Based Buffer Overflow Vulnerability

Vereiste actie (tekst van CISA, Engels)

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

Beschrijving (NVD, Engels)

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.

BRONNEN

• CISA KEVCISA Known Exploited Vulnerabilities catalog

Andere lekken bij Microsoft

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• CVE-2026-65660: Microsoft SharePoint Code Injection Vulnerability
• CVE-2026-85880: Microsoft Windows Heap-Based Buffer Overflow Vulnerability

Gegevens van NVD, CISA KEV, FIRST EPSS en adviezen van leveranciers. Bijgewerkt 10 nov 2026.