{"$ref":"https://www.cert.ssi.gouv.fr/openapi.json","affected_systems":[{"description":"Microsoft Office LTSC 2021 pour \u00e9ditions 64 bits","product":{"name":"Office","vendor":{"name":"Microsoft","scada":false}}},{"description":"Microsoft Office LTSC 2021 pour \u00e9ditions 32 bits","product":{"name":"Office","vendor":{"name":"Microsoft","scada":false}}},{"description":"Microsoft Office 2019 pour \u00e9ditions 32 bits","product":{"name":"Office","vendor":{"name":"Microsoft","scada":false}}},{"description":"Microsoft 365 Apps pour Enterprise pour syst\u00e8mes 64 bits","product":{"name":"Office","vendor":{"name":"Microsoft","scada":false}}},{"description":"Microsoft Office 2019 pour \u00e9ditions 64 bits","product":{"name":"Office","vendor":{"name":"Microsoft","scada":false}}},{"description":"Microsoft Office LTSC 2024 pour \u00e9ditions 64 bits","product":{"name":"Office","vendor":{"name":"Microsoft","scada":false}}},{"description":"Microsoft Office 2016 (\u00e9dition 64 bits)","product":{"name":"Office","vendor":{"name":"Microsoft","scada":false}}},{"description":"Microsoft Office 2016 (\u00e9dition 32 bits)","product":{"name":"Office","vendor":{"name":"Microsoft","scada":false}}},{"description":"Microsoft Office LTSC 2024 pour \u00e9ditions 32 bits","product":{"name":"Office","vendor":{"name":"Microsoft","scada":false}}},{"description":"Microsoft 365 Apps pour Enterprise pour syst\u00e8mes 32 bits","product":{"name":"Office","vendor":{"name":"Microsoft","scada":false}}}],"affected_systems_content":"","content":"## Solutions\n\nSe r\u00e9f\u00e9rer au bulletin de s\u00e9curit\u00e9 de l'\u00e9diteur pour l'obtention des correctifs (cf. section Documentation).","cves":[{"name":"CVE-2026-21509","url":"https://www.cve.org/CVERecord?id=CVE-2026-21509"}],"links":[],"reference":"CERTFR-2026-AVI-0089","revisions":[{"description":"Version initiale","revision_date":"2026-01-27T00:00:00.000000"}],"risks":[{"description":"Contournement de la politique de s\u00e9curit\u00e9"}],"summary":"Une vuln\u00e9rabilit\u00e9 a \u00e9t\u00e9 d\u00e9couverte dans Microsoft Office. Elle permet \u00e0 un attaquant de provoquer un contournement de la politique de s\u00e9curit\u00e9.\n\nMicrosoft indique que la vuln\u00e9rabilit\u00e9 CVE-2026-21509 est activement exploit\u00e9e.","title":"Vuln\u00e9rabilit\u00e9 dans Microsoft Office","vendor_advisories":[{"published_at":"2026-01-26","title":"Bulletin de s\u00e9curit\u00e9 Microsoft Office CVE-2026-21509","url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-21509"}]}