{"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"}