CVE-2025-21418
Act now ● On CISA KEV — actively exploited
Actively exploited — on the CISA KEV list.
CVSS base
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EPSS — probability of exploitation (30 days)
1.6%
74.2th percentile
CISA KEV
Listed
Added 2025-02-11 · patch by 2025-03-04
Weakness / dates
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Published — · modified —
Timeline
- 2025-02-11 — Added to CISA KEV (actively exploited)
- 2025-03-04 — CISA patch-by deadline
Description
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.