{"id":"CVE-2021-38646","aliases":["EUVD-2021-25085","GHSA-846x-h43v-68x9"],"status":"published","title":"Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability","description":"Microsoft Office Access Connectivity Engine 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":0.07987,"percentile":0.94829,"model":"v2026.06.15"},"facts":{"in_kev":true,"known_exploited":true,"public_exploit":false,"fix_available":false},"cwes":["CWE-119"],"published":"2021-09-15T11:24:06Z","modified":"2026-08-10T19:59:12Z","kev":{"date_added":"2022-03-28","due_date":"2022-04-18","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Known"},"exploitation":[{"source":"euvd","since":"2022-03-28"},{"source":"kev","since":"2022-03-28"}],"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":"office"},{"vendor":"microsoft","product":"office_2016"},{"vendor":"microsoft","product":"office_2019"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38646","tags":["vendor-advisory","patch","Patch","Vendor Advisory"]},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38646","tags":["x_refsource_MISC","x_transferred","Patch","Vendor Advisory"]},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-38646","tags":["government-resource","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-38646"},{"url":"https://github.com/advisories/GHSA-846x-h43v-68x9"}],"sources":{"cve":[{"id":"CVE-2021-38646","title":"Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability","description":"Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability","status":"published","published":"2021-09-15T11:24:06Z","modified":"2026-08-10T15:11:01.156Z","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":"2026-11-02T14:33:07.349244Z"}],"euvd":[{"id":"EUVD-2021-25085","description":"Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability","status":"published","published":"2021-09-15T11:24:06Z","modified":"2026-08-10T15:11:01Z","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"}],"exploited_since":"2022-03-28","updated_at":"2026-11-02T18:02:04.543433Z"}],"ghsa":[{"id":"GHSA-846x-h43v-68x9","title":"Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability","description":"Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability","status":"published","published":"2022-05-24T19:14:43Z","modified":"2026-08-10T18:31:10Z","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"}],"cwes":["CWE-119"],"updated_at":"2026-11-02T15:10:14.704025Z"}],"kev":[{"id":"CVE-2021-38646","title":"Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability","description":"Microsoft Office Access Connectivity Engine contains an unspecified vulnerability which can allow for remote code execution.","kev":{"date_added":"2022-03-28","due_date":"2022-04-18","required_action":"Apply updates per vendor instructions.","known_ransomware_use":"Known"},"updated_at":"2026-11-02T17:00:16.541131Z"}],"nvd":[{"id":"CVE-2021-38646","description":"Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability","status":"published","published":"2021-09-15T12:15:15.033Z","modified":"2026-08-10T19:59:12.03Z","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":"2026-11-02T14:06:58.502206Z"}]}}