{"id":"CVE-2021-34478","aliases":["EUVD-2021-21133","GHSA-j59g-pjr7-6mxg"],"status":"published","title":"Microsoft Office Remote Code Execution Vulnerability","description":"Microsoft Office 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":0.51524,"percentile":0.98958,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2021-08-12T18:11:50Z","modified":"2026-08-10T18:30:55Z","products":[{"vendor":"microsoft","product":"365_apps"},{"vendor":"microsoft","product":"microsoft 365 apps for enterprise"},{"vendor":"microsoft","product":"microsoft office 2019"},{"vendor":"microsoft","product":"office"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-34478","tags":["vendor-advisory","patch"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-34478","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-21-1024/","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","VDB Entry"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-34478"},{"url":"https://www.zerodayinitiative.com/advisories/ZDI-21-1024"},{"url":"https://github.com/advisories/GHSA-j59g-pjr7-6mxg"}],"sources":{"cve":[{"id":"CVE-2021-34478","title":"Microsoft Office Remote Code Execution Vulnerability","description":"Microsoft Office Remote Code Execution Vulnerability","status":"published","published":"2021-08-12T18:11:50Z","modified":"2026-08-10T15:09:52.053Z","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-2021-21133","description":"Microsoft Office Remote Code Execution Vulnerability","status":"published","published":"2021-08-12T18:11:50Z","modified":"2026-08-10T15:09:52Z","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":"2026-11-02T18:02:05.388264Z"}],"ghsa":[{"id":"GHSA-j59g-pjr7-6mxg","title":"Microsoft Office Remote Code Execution Vulnerability","description":"Microsoft Office Remote Code Execution Vulnerability","status":"published","published":"2022-05-24T19:10:53Z","modified":"2026-08-10T18:30:55Z","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-2021-34478","description":"Microsoft Office Remote Code Execution Vulnerability","status":"published","published":"2021-08-12T18:15:09.003Z","modified":"2026-08-10T16:17:49.517Z","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":"2026-11-02T14:06:56.943671Z"}]}}