{"id":"CVE-2021-38646","title":"Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability","summary":"Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability","severity":"high","cvss":7.8,"cvssVector":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","vendor":"microsoft","product":"365_apps","affected":["365_apps","office = 2013","office_2016","office_2019"],"published":"2021-09-15","updated":"2026-08-10","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2021-38646","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38646","label":"secure@microsoft.com"},{"url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38646","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-38646","label":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}],"tags":["nvd","kev","in-the-wild"],"epss":0.07987,"epssPercentile":0.94548,"kev":true,"kevDateAdded":"2022-03-28","kevDueDate":"2022-04-18","kevRansomware":true,"exploited":true,"ingestedAt":"2026-08-11T16:47:01.290Z","slug":"CVE-2021-38646","body":"## Overview\n\nMicrosoft Office Access Connectivity Engine Remote Code Execution Vulnerability\n\n## Affected\n\n- `365_apps`\n- `office = 2013`\n- `office_2016`\n- `office_2019`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"abyssal","depthScore":74,"depthScoreParts":{"impact":42.9,"likelihood":1.6,"exploitation":25,"ransomware":5},"changes":[]}