{"schema":"threatline.record/2","record":{"id":"CVE-2021-38646","aliases":[],"summary":"Microsoft Office Access Connectivity Engine Remote Code Execution Vulnerability","details":"Microsoft Office Access Connectivity Engine contains an unspecified vulnerability which can allow for remote code execution.","categories":["Applications & CMS"],"product":"Office","vendor":"Microsoft","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-38646","source_modified_at":"2026-08-10T15:11:01.156Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Microsoft 365 Apps for Enterprise","vendor":"Microsoft","versions":[{"version":"16.0.1","lessThan":"https://aka.ms/OfficeSecurityReleases","versionType":"custom","status":"affected"}],"defaultStatus":null},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-38646","source_modified_at":"2026-08-10T15:11:01.156Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Microsoft Office 2013 Service Pack 1","vendor":"Microsoft","versions":[{"version":"15.0.0","lessThan":"5381.1000","versionType":"custom","status":"affected"}],"defaultStatus":null},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-38646","source_modified_at":"2026-08-10T15:11:01.156Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Microsoft Office 2016","vendor":"Microsoft","versions":[{"version":"16.0.0","lessThan":"5215.1000","versionType":"custom","status":"affected"}],"defaultStatus":null},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-38646","source_modified_at":"2026-08-10T15:11:01.156Z","fetched_at":"2026-10-23T18:42:43.628194Z","product":"Microsoft Office 2019","vendor":"Microsoft","versions":[{"version":"19.0.0","lessThan":"https://aka.ms/OfficeSecurityReleases","versionType":"custom","status":"affected"}],"defaultStatus":null}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-38646","source_modified_at":"2026-08-10T15:11:01.156Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Microsoft Office 2013 Service Pack 1","ecosystem":null},"version":"5381.1000","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2021-38646","source_modified_at":"2026-08-10T15:11:01.156Z","fetched_at":"2026-10-23T18:42:43.628194Z","package":{"name":"Microsoft Office 2016","ecosystem":null},"version":"5215.1000","basis":"first unaffected version stated in the CVE record"}],"cvss":7.8,"severity":"High","kev":{"listed":true,"date_added":"2022-03-28","due_date":"2022-04-18","required_action":"Apply updates per vendor instructions.","ransomware_campaign_use":"Known"},"epss":{"probability":0.07987,"percentile":0.94753,"score_date":"2026-10-23"},"published_at":"2021-09-15T11:24:06.000Z","modified_at":"2026-08-10T15:11:01.156Z","provenance":[{"source":"CISA KEV","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23T17:00:09.9001Z"},{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2021-38646","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-08-10T15:11:01.156Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2021-38646","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CISA KEV","CVE List","EPSS"],"references":[{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-38646","source":"CISA KEV"},{"source":"CVE List","url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2021-38646","tags":["vendor-advisory","patch"]},{"source":"CVE List","url":"https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2021-38646","tags":["x_refsource_MISC","x_transferred"]},{"source":"CVE List","url":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-38646","tags":["government-resource"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"active","automatable":"no","technical_impact":"total","assessed_at":"2025-02-04T18:11:37.868401Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-08-10T15:11:01.156Z","content_hash":"ef180dd99fb249129b4ed2a7d46eea76dad6796a5afdd6107de72db199faca09"}}