CVE-2025-21418🔥 Known Exploited (CISA KEV)HIGH7.8CVSS Severity ScoreEPSS Score0.0000%EPSS Percentile0.00thPublished2025-02-11Last Modified2026-06-17Data SourcesNVDCISA KEVVulnerability DescriptionWindows Ancillary Function Driver for WinSock Elevation of Privilege VulnerabilityAffected Platforms (CPE)💻MicrosoftWindows 10 1607< 10.0.10240.20915💻MicrosoftWindows 10 1809< 10.0.17763.6893💻MicrosoftWindows 10 21h2< 10.0.19044.5487💻MicrosoftWindows 10 22h2< 10.0.19045.5487Show All Affected Platforms (+10 more)References & Advisories🔗 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-21418🔗 https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-21418