{"id":"CVE-2021-40452","aliases":["EUVD-2021-27629","GHSA-c99h-54j2-mm4w"],"status":"published","title":"HEVC Video Extensions Remote Code Execution Vulnerability","description":"HEVC Video Extensions 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":0.02655,"percentile":0.8579,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-12-15T14:14:50Z","modified":"2026-06-17T04:06:56Z","products":[{"vendor":"microsoft","product":"hevc video extensions"},{"vendor":"microsoft","product":"hevc_video_extensions"}],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-40452","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-40452"},{"url":"https://github.com/advisories/GHSA-c99h-54j2-mm4w"}],"sources":{"cve":[{"id":"CVE-2021-40452","title":"HEVC Video Extensions Remote Code Execution Vulnerability","description":"HEVC Video Extensions Remote Code Execution Vulnerability","status":"published","published":"2021-12-15T14:14:50Z","modified":"2024-11-18T20:19:54.331Z","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":"2026-11-02T14:33:01.495293Z"}],"euvd":[{"id":"EUVD-2021-27629","description":"HEVC Video Extensions Remote Code Execution Vulnerability","status":"published","published":"2021-12-15T14:14:50Z","modified":"2024-11-18T20:19:54Z","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":"2026-11-03T00:04:56.531722Z"}],"ghsa":[{"id":"GHSA-c99h-54j2-mm4w","title":"HEVC Video Extensions Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021...","description":"HEVC Video Extensions Remote Code Execution Vulnerability This CVE ID is unique from CVE-2021-40453, CVE-2021-41360.","status":"published","published":"2021-12-16T00:02:11Z","modified":"2024-01-05T05:05:28Z","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":"2026-11-02T14:55:20.27804Z"}],"nvd":[{"id":"CVE-2021-40452","description":"HEVC Video Extensions Remote Code Execution Vulnerability","status":"published","published":"2021-12-15T15:15:08.633Z","modified":"2026-06-17T04:06:56.783Z","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":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:07:02.189991Z"}]}}