{"id":"CVE-2026-64921","aliases":["EUVD-2026-56722","GHSA-92r3-28gr-fr7w"],"status":"published","title":"Microsoft SharePoint Server Elevation of Privilege Vulnerability","description":"Missing authentication for critical function in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.","severity":{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-10","score":0.0094,"percentile":0.61225,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-306"],"published":"2026-08-11T17:06:46Z","modified":"2026-10-30T17:22:33Z","products":[{"vendor":"microsoft","product":"microsoft sharepoint enterprise server 2016"},{"vendor":"microsoft","product":"microsoft sharepoint server 2019"},{"vendor":"microsoft","product":"microsoft sharepoint server subscription edition"},{"vendor":"microsoft","product":"sharepoint_server"}],"references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64921","tags":["vendor-advisory","patch","Vendor Advisory","Patch"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-64921"},{"url":"https://github.com/advisories/GHSA-92r3-28gr-fr7w"}],"sources":{"cve":[{"id":"CVE-2026-64921","title":"Microsoft SharePoint Server Elevation of Privilege Vulnerability","description":"Missing authentication for critical function in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-08-11T17:06:46.993Z","modified":"2026-10-30T17:22:33.044Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high","assessor":"cna"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T14:19:58.214427Z"}],"euvd":[{"id":"EUVD-2026-56722","description":"Missing authentication for critical function in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-08-11T17:06:46Z","modified":"2026-10-30T17:22:33Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","level":"high"}],"updated_at":"2026-11-02T16:59:03.451007Z"}],"ghsa":[{"id":"GHSA-92r3-28gr-fr7w","title":"Missing authentication for critical function in Microsoft Office SharePoint allows an authorized...","description":"Missing authentication for critical function in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-08-11T18:31:35Z","modified":"2026-08-11T18:31:40Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T15:10:20.045782Z"}],"nvd":[{"id":"CVE-2026-64921","description":"Missing authentication for critical function in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.","status":"published","published":"2026-08-11T17:18:53.463Z","modified":"2026-08-13T13:37:46.633Z","cvss":[{"version":"3.1","score":8.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-306"],"updated_at":"2026-11-02T14:12:36.880938Z"}]}}