{"id":"CVE-2021-43243","aliases":["EUVD-2021-30187","GHSA-vxh6-3w55-j34c"],"status":"published","title":"VP9 Video Extensions Information Disclosure Vulnerability","description":"VP9 Video Extensions Information Disclosure Vulnerability","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.00788,"percentile":0.56516,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-12-15T14:15:24Z","modified":"2026-06-17T04:10:43Z","products":[{"vendor":"microsoft","product":"vp9 video extensions"},{"vendor":"microsoft","product":"vp9_video_extensions"}],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43243","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43243"},{"url":"https://github.com/advisories/GHSA-vxh6-3w55-j34c"}],"sources":{"cve":[{"id":"CVE-2021-43243","title":"VP9 Video Extensions Information Disclosure Vulnerability","description":"VP9 Video Extensions Information Disclosure Vulnerability","status":"published","published":"2021-12-15T14:15:24Z","modified":"2026-05-28T19:53:36.803Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:32:57.033395Z"}],"euvd":[{"id":"EUVD-2021-30187","description":"VP9 Video Extensions Information Disclosure Vulnerability","status":"published","published":"2021-12-15T14:15:24Z","modified":"2026-05-28T19:53:36Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-02T18:21:01.680356Z"}],"ghsa":[{"id":"GHSA-vxh6-3w55-j34c","title":"VP9 Video Extensions Information Disclosure Vulnerability","description":"VP9 Video Extensions Information Disclosure Vulnerability","status":"published","published":"2021-12-16T00:01:51Z","modified":"2023-02-01T05:07:10Z","updated_at":"2026-11-02T14:50:29.480738Z"}],"nvd":[{"id":"CVE-2021-43243","description":"VP9 Video Extensions Information Disclosure Vulnerability","status":"published","published":"2021-12-15T15:15:10.41Z","modified":"2026-06-17T04:10:43.577Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":2.1,"vector":"AV:L/AC:L/Au:N/C:P/I:N/A:N","level":"low","assessor":"primary"}],"updated_at":"2026-11-02T14:07:02.189991Z"}]}}