{"id":"CVE-2026-102866","aliases":[],"title":"Microsoft Office SharePoint Elevation of Privilege Vulnerability","titleSource":"microsoft","descriptionSource":"microsoft","products":[{"vendor":"Microsoft","name":"Microsoft SharePoint Server Subscription Edition","platforms":["x64-based Systems"],"versions":[{"version":"16.0.0","status":"affected","lessThan":"16.0.20326.20190","versionType":"custom"}],"source":"microsoft","url":"https://www.cve.org/CVERecord?id=CVE-2026-102866"}],"remediation":[],"description":"Improper verification of cryptographic signature in Microsoft Office SharePoint allows an unauthorized attacker to elevate privileges over a network.","severity":"high","score":8.1,"published":"2026-10-13T18:59:29.386Z","modified":"2026-10-27T21:23:52.526Z","withdrawn":false,"knownExploited":false,"affected":[],"references":["https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-102866"],"sources":[{"name":"CVE","id":"CVE-2026-102866","modified":"2026-10-27T21:23:52.526Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-102866"}],"assessments":[{"source":"microsoft","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","score":8.1}],"sourceAffected":[],"kev":{"status":"not-listed","checkedAt":"2026-10-28T14:40:33.551Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}