{"id":"CVE-2021-34439","aliases":["EUVD-2021-21094","GHSA-j7c9-v542-pqfh"],"status":"published","title":"Microsoft Windows Media Foundation Remote Code Execution Vulnerability","description":"Microsoft Windows Media Foundation Remote Code Execution Vulnerability","severity":{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.02668,"percentile":0.85867,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-07-16T20:19:32Z","modified":"2026-08-10T18:30:46Z","products":[{"vendor":"microsoft","product":"windows 10 version 1507"},{"vendor":"microsoft","product":"windows 10 version 1607"},{"vendor":"microsoft","product":"windows server 2016"},{"vendor":"microsoft","product":"windows server 2016 (server core installation)"},{"vendor":"microsoft","product":"windows_10"},{"vendor":"microsoft","product":"windows_server_2016"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34439","tags":["vendor-advisory","patch"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34439","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34439"},{"url":"https://github.com/advisories/GHSA-j7c9-v542-pqfh"}],"sources":{"cve":[{"id":"CVE-2021-34439","title":"Microsoft Windows Media Foundation Remote Code Execution Vulnerability","description":"Microsoft Windows Media Foundation Remote Code Execution Vulnerability","status":"published","published":"2021-07-16T20:19:32Z","modified":"2026-08-10T15:11:46.013Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"updated_at":"2026-11-02T14:33:11.59359Z"}],"euvd":[{"id":"EUVD-2021-21094","description":"Microsoft Windows Media Foundation Remote Code Execution Vulnerability","status":"published","published":"2021-07-16T20:19:32Z","modified":"2026-08-10T15:11:46Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-02T18:02:03.704262Z"}],"ghsa":[{"id":"GHSA-j7c9-v542-pqfh","title":"Microsoft Windows Media Foundation Remote Code Execution Vulnerability This CVE ID is unique from...","description":"Microsoft Windows Media Foundation Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-34441, CVE-2021-34503.","status":"published","published":"2022-05-24T19:08:16Z","modified":"2026-08-10T18:30:46Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T15:10:14.704025Z"}],"nvd":[{"id":"CVE-2021-34439","description":"Microsoft Windows Media Foundation Remote Code Execution Vulnerability","status":"published","published":"2021-07-16T21:15:09.323Z","modified":"2026-08-10T16:17:43.83Z","cvss":[{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":7.8,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"2.0","score":9.3,"vector":"AV:N/AC:M/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:06:55.747384Z"}]}}