{"cve":"CVE-2021-28465","nvd":{"published":"2021-05-11T19:15:09.060","modified":"2026-06-17T03:46:24.617","status":"Modified","description":"Web Media Extensions Remote Code Execution Vulnerability","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","score":7.8},"cwes":["CWE-787"],"references":["https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28465","https://www.zerodayinitiative.com/advisories/ZDI-21-572/","https://www.zerodayinitiative.com/advisories/ZDI-21-579/","https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-28465","https://www.zerodayinitiative.com/advisories/ZDI-21-572/"],"products":["microsoft:web_media_extensions"],"source":"nvd","synced_at":"2026-10-19T21:18:09.669877188+00:00"},"epss":{"cve":"CVE-2021-28465","score":0.03663,"percentile":0.89639,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}