{"id":"CVE-2021-43255","aliases":["EUVD-2021-30199","GHSA-x5f4-jxc9-j6mv"],"status":"published","title":"Microsoft Office Trust Center Spoofing Vulnerability","description":"Microsoft Office Trust Center Spoofing Vulnerability","severity":{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.02085,"percentile":0.81729,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-12-15T14:15:28Z","modified":"2026-06-17T04:10:44Z","products":[{"vendor":"microsoft","product":"365_apps"},{"vendor":"microsoft","product":"microsoft 365 apps for enterprise"},{"vendor":"microsoft","product":"microsoft office 2013 service pack 1"},{"vendor":"microsoft","product":"microsoft office 2016"},{"vendor":"microsoft","product":"microsoft office 2019"},{"vendor":"microsoft","product":"microsoft office ltsc 2021"},{"vendor":"microsoft","product":"office"},{"vendor":"microsoft","product":"office_long_term_servicing_channel"}],"references":[{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-43255","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-43255"},{"url":"https://github.com/advisories/GHSA-x5f4-jxc9-j6mv"}],"sources":{"cve":[{"id":"CVE-2021-43255","title":"Microsoft Office Trust Center Spoofing Vulnerability","description":"Microsoft Office Trust Center Spoofing Vulnerability","status":"published","published":"2021-12-15T14:15:28Z","modified":"2024-08-04T03:55:28.195Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","level":"medium","assessor":"cna"}],"updated_at":"2026-11-02T14:32:56.689433Z"}],"euvd":[{"id":"EUVD-2021-30199","description":"Microsoft Office Trust Center Spoofing Vulnerability","status":"published","published":"2021-12-15T14:15:28Z","modified":"2024-08-04T03:55:28Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N/E:U/RL:O/RC:C","level":"medium"}],"updated_at":"2026-11-03T03:24:14.245608Z"}],"ghsa":[{"id":"GHSA-x5f4-jxc9-j6mv","title":"Microsoft Office Trust Center Spoofing Vulnerability","description":"Microsoft Office Trust Center Spoofing Vulnerability","status":"published","published":"2021-12-16T00:01:48Z","modified":"2026-05-19T21:32:59Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T15:08:12.634242Z"}],"nvd":[{"id":"CVE-2021-43255","description":"Microsoft Office Trust Center Spoofing Vulnerability","status":"published","published":"2021-12-15T15:15:10.687Z","modified":"2026-06-17T04:10:44.473Z","cvss":[{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.5,"vector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:07:02.189991Z"}]}}