{"id":"CVE-2021-43256","aliases":["EUVD-2021-30200","GHSA-xf9j-qfgm-f8jm"],"status":"published","title":"Microsoft Excel Remote Code Execution Vulnerability","description":"Microsoft Excel 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":"2026-11-11","score":0.02181,"percentile":0.82602,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-12-15T14:15:29Z","modified":"2026-06-17T04:10:44Z","products":[{"vendor":"microsoft","product":"365_apps"},{"vendor":"microsoft","product":"excel"},{"vendor":"microsoft","product":"excel_rt"},{"vendor":"microsoft","product":"microsoft 365 apps for enterprise"},{"vendor":"microsoft","product":"microsoft excel 2013 service pack 1"},{"vendor":"microsoft","product":"microsoft excel 2016"},{"vendor":"microsoft","product":"microsoft office 2019"},{"vendor":"microsoft","product":"microsoft office ltsc 2021"},{"vendor":"microsoft","product":"microsoft office web apps server 2013 service pack 1"},{"vendor":"microsoft","product":"office"},{"vendor":"microsoft","product":"office online server"},{"vendor":"microsoft","product":"office_long_term_servicing_channel"},{"vendor":"microsoft","product":"office_online_server"},{"vendor":"microsoft","product":"office_web_apps"}],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43256","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43256"},{"url":"https://github.com/advisories/GHSA-xf9j-qfgm-f8jm"}],"sources":{"cve":[{"id":"CVE-2021-43256","title":"Microsoft Excel Remote Code Execution Vulnerability","description":"Microsoft Excel Remote Code Execution Vulnerability","status":"published","published":"2021-12-15T14:15:29Z","modified":"2024-08-04T03:55:28.38Z","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":"2026-11-02T14:32:57.033395Z"}],"euvd":[{"id":"EUVD-2021-30200","description":"Microsoft Excel Remote Code Execution Vulnerability","status":"published","published":"2021-12-15T14:15:29Z","modified":"2024-08-04T03:55:28Z","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/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-03T03:24:14.245608Z"}],"ghsa":[{"id":"GHSA-xf9j-qfgm-f8jm","title":"Microsoft Excel Remote Code Execution Vulnerability","description":"Microsoft Excel Remote Code Execution Vulnerability","status":"published","published":"2021-12-16T00:01:47Z","modified":"2026-05-19T21:31:56Z","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":"2026-11-02T15:08:12.634242Z"}],"nvd":[{"id":"CVE-2021-43256","description":"Microsoft Excel Remote Code Execution Vulnerability","status":"published","published":"2021-12-15T15:15:10.73Z","modified":"2026-06-17T04:10:44.587Z","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":"primary"},{"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"}]}}