{"schema":"threatline.record/2","record":{"id":"CVE-2026-100209","aliases":[],"summary":"Microsoft Office Excel Remote Code Execution Vulnerability","details":"Use after free in Microsoft Office Excel allows an unauthorized attacker to execute code over a network.","categories":["Applications & CMS"],"product":"Microsoft 365 Apps for Enterprise","vendor":"Microsoft","ecosystem":null,"affected_ranges":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100209","source_modified_at":"2026-10-23T22:31:33.563Z","fetched_at":"2026-10-24T00:31:04.721601Z","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-2026-100209","source_modified_at":"2026-10-23T22:31:33.563Z","fetched_at":"2026-10-24T00:31:04.721601Z","product":"Microsoft Office 365 for Mac","vendor":"Microsoft","versions":[{"version":"1.0.0","lessThan":"16.114.26101123","versionType":"custom","status":"affected"}],"defaultStatus":null},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100209","source_modified_at":"2026-10-23T22:31:33.563Z","fetched_at":"2026-10-24T00:31:04.721601Z","product":"Microsoft Office LTSC 2024","vendor":"Microsoft","versions":[{"version":"16.0.0","lessThan":"16.0.17932.21056","versionType":"custom","status":"affected"}],"defaultStatus":null},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100209","source_modified_at":"2026-10-23T22:31:33.563Z","fetched_at":"2026-10-24T00:31:04.721601Z","product":"Microsoft Office LTSC for Mac 2021","vendor":"Microsoft","versions":[{"version":"16.0.1","lessThan":"16.114.26101123","versionType":"custom","status":"affected"}],"defaultStatus":null},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100209","source_modified_at":"2026-10-23T22:31:33.563Z","fetched_at":"2026-10-24T00:31:04.721601Z","product":"Microsoft Office LTSC for Mac 2024","vendor":"Microsoft","versions":[{"version":"16.0.0","lessThan":"16.114.26101123","versionType":"custom","status":"affected"}],"defaultStatus":null}],"fixed_versions":[{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100209","source_modified_at":"2026-10-23T22:31:33.563Z","fetched_at":"2026-10-24T00:31:04.721601Z","package":{"name":"Microsoft Office 365 for Mac","ecosystem":null},"version":"16.114.26101123","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100209","source_modified_at":"2026-10-23T22:31:33.563Z","fetched_at":"2026-10-24T00:31:04.721601Z","package":{"name":"Microsoft Office LTSC 2024","ecosystem":null},"version":"16.0.17932.21056","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100209","source_modified_at":"2026-10-23T22:31:33.563Z","fetched_at":"2026-10-24T00:31:04.721601Z","package":{"name":"Microsoft Office LTSC for Mac 2021","ecosystem":null},"version":"16.114.26101123","basis":"first unaffected version stated in the CVE record"},{"source":"CVE List","source_url":"https://www.cve.org/CVERecord?id=CVE-2026-100209","source_modified_at":"2026-10-23T22:31:33.563Z","fetched_at":"2026-10-24T00:31:04.721601Z","package":{"name":"Microsoft Office LTSC for Mac 2024","ecosystem":null},"version":"16.114.26101123","basis":"first unaffected version stated in the CVE record"}],"cvss":8.8,"severity":"High","kev":{"listed":false},"epss":{"probability":0.00821,"percentile":0.56868,"score_date":"2026-10-23"},"published_at":"2026-10-13T19:01:30.470Z","modified_at":"2026-10-23T22:31:33.563Z","provenance":[{"source":"CVE List","url":"https://www.cve.org/CVERecord?id=CVE-2026-100209","fetched_at":"2026-10-24T00:31:04.721601Z","source_modified_at":"2026-10-23T22:31:33.563Z"},{"source":"EPSS","url":"https://api.first.org/data/v1/epss?cve=CVE-2026-100209","fetched_at":"2026-10-23T18:42:43.628194Z","source_modified_at":"2026-10-23"}],"sources":["CVE List","EPSS"],"references":[{"source":"CVE List","url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-100209","tags":["vendor-advisory","patch"]}],"locations":[],"motoko_assessment":{"status":"requires_architecture_review","automatic_remediation":false},"cve_state":"PUBLISHED","cvss_source":"CVE List","ssvc":{"exploitation":"none","automatable":"no","technical_impact":"total","assessed_at":"2026-10-13T19:15:40.327977Z"},"classification":{"method":"product-first software-layer rules","rules_version":"2.1","matched_on":"product","confidence":"heuristic","reviewed":false},"change_timestamp":"2026-10-23T22:31:33.563Z","content_hash":"c6d025d390a9d62b70956d7caef3f01700c02acd41eb11c898da48c48962daee"}}