{"$ref":"https://www.cert.ssi.gouv.fr/openapi.json","affected_systems":[{"description":"Microsoft SharePoint Enterprise Server 2016 versions ant\u00e9rieures \u00e0 16.0.5556.1005","product":{"name":"SharePoint Enterprise Server 2016","vendor":{"name":"Microsoft","scada":false}}},{"description":"Microsoft SharePoint Server Subscription Edition versions ant\u00e9rieures \u00e0 16.0.19725.20384","product":{"name":"SharePoint Server Subscription Edition","vendor":{"name":"Microsoft","scada":false}}},{"description":"Microsoft SharePoint Enterprise Server 2016 versions ant\u00e9rieures \u00e0 16.0.5561.1001","product":{"name":"SharePoint Enterprise Server 2016","vendor":{"name":"Microsoft","scada":false}}},{"description":"Microsoft SharePoint Server 2019 versions ant\u00e9rieures \u00e0 16.0.10417.20153","product":{"name":"SharePoint Server 2019","vendor":{"name":"Microsoft","scada":false}}},{"description":"Microsoft SharePoint Server Subscription Edition versions ant\u00e9rieures \u00e0 16.0.19725.20434","product":{"name":"SharePoint Server Subscription Edition","vendor":{"name":"Microsoft","scada":false}}},{"description":"Microsoft SharePoint Server 2019 versions ant\u00e9rieures \u00e0 16.0.10417.20175","product":{"name":"SharePoint Server 2019","vendor":{"name":"Microsoft","scada":false}}}],"affected_systems_content":"","closed_at":null,"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-2026-50522","url":"https://www.cve.org/CVERecord?id=CVE-2026-50522"},{"name":"CVE-2026-58644","url":"https://www.cve.org/CVERecord?id=CVE-2026-58644"}],"links":[{"title":"Communication Defused du 20 juillet 2026","url":"https://x.com/DefusedCyber/status/2079128402855116858"},{"title":"Communication watchTowr du 21 juillet 2026","url":"https://www.linkedin.com/feed/update/urn:li:activity:7485278595850940416/"},{"title":"Avis CERT-FR CERTFR-2026-AVI-0872 du 15 juillet 2026","url":"https://www.cert.ssi.gouv.fr/avis/CERTFR-2026-AVI-0872/"},{"title":"Alerte CERT-FR CERTFR-2025-ALE-010 du 21 juillet 2025","url":"https://www.cert.ssi.gouv.fr/alerte/CERTFR-2025-ALE-010/"}],"reference":"CERTFR-2026-ALE-008","revisions":[{"description":"Version initiale","revision_date":"2026-07-22T00:00:00.000000"}],"risks":[{"description":"Ex\u00e9cution de code arbitraire \u00e0 distance"}],"summary":"Le 14 juillet 2026, \u00e0 l'occasion de sa mise \u00e0 jour mensuelle, Microsoft a publi\u00e9, entre autres, des correctifs pour deux vuln\u00e9rabilit\u00e9s critiques affectant SharePoint.\n\nLes vuln\u00e9rabilit\u00e9s CVE-2026-50522 et CVE-2026-58644 permettent \u00e0 un attaquant non authentifi\u00e9 d'ex\u00e9cuter du code arbitraire \u00e0 distance.\n\nDans son avis du 14 juillet 2026, Microsoft a indiqu\u00e9 que la vuln\u00e9rabilit\u00e9 CVE-2026-58644 est activement exploit\u00e9e.\n\nDans une communication en date du 21 juillet 2026, l'entreprise de s\u00e9curit\u00e9 informatique watchTowr d\u00e9clare avoir connaissance d'une preuve de concept publique, ainsi que d'exploitations actives de la vuln\u00e9rabilit\u00e9 CVE-2026-50522.\n\nLe CERT-FR recommande donc l'application des correctifs dans les plus brefs d\u00e9lais.<br>\nEn cas de soup\u00e7ons de compromission, le CERT-FR recommande \u00e9galement le changement des secrets, incluant la rotation des cl\u00e9s de machine ASP.NET du SharePoint Server. <br>\nEn effet, le vol de ces secrets peut permettre \u00e0 l'attaquant de revenir apr\u00e8s  l'application de la mise \u00e0 jour.","title":"Multiples vuln\u00e9rabilit\u00e9s dans Microsoft Sharepoint","vendor_advisories":[{"published_at":"2026-07-14","title":"Bulletin de s\u00e9curit\u00e9 Microsoft CVE-2026-50522","url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50522"},{"published_at":"2026-07-14","title":"Bulletin de s\u00e9curit\u00e9 Microsoft CVE-2026-58644","url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-58644"}]}