{
  "cvss": 0.0,
  "datePublished": "2025-02-11",
  "dateUpdated": "2025-02-11",
  "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.",
  "dueDate": "2025-03-04",
  "id": "CVE-2025-21418",
  "kev_catalogs": [
    "cisa"
  ],
  "knownRansomwareCampaignUse": "Unknown",
  "notes": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21418 ; https://nvd.nist.gov/vuln/detail/CVE-2025-21418",
  "product": "Windows",
  "requiredAction": "Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.",
  "severity": "HIGH",
  "source": "cisa_known_exploited",
  "title": "Microsoft Windows Ancillary Function Driver for WinSock Heap-Based Buffer Overflow Vulnerability",
  "vendor": "Microsoft"
}