{"id":"CVE-2026-55052","title":"Microsoft SharePoint Elevation of Privilege Vulnerability","summary":"Missing authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.","severity":"high","cvss":8.8,"cvssVector":"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","cvssSource":"cna","cwe":["CWE-862"],"vendor":"Microsoft","product":"Microsoft SharePoint Enterprise Server 2016","affected":["sharepoint_enterprise_server_2016 >= 16.0.0 < 16.0.5561.1001","sharepoint_server_2019 >= 16.0.0 < 16.0.10417.20175","sharepoint_server_subscription_edition >= 16.0.0 < 16.0.19725.20434"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-07-13T00:00:00+00:00"},"published":"2026-07-14","updated":"2026-09-17","sourceUpdated":"2026-09-17T22:33:05.550Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-55052","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-55052","label":"Microsoft SharePoint Elevation of Privilege Vulnerability"}],"tags":["cve.org"],"epss":0.0094,"epssPercentile":0.58847,"ingestedAt":"2026-09-08T17:06:31.908Z","slug":"CVE-2026-55052","body":"## Overview\n\nMissing authorization in Microsoft Office SharePoint allows an authorized attacker to elevate privileges over a network.\n\n## Affected\n\n- `sharepoint_enterprise_server_2016 >= 16.0.0 < 16.0.5561.1001`\n- `sharepoint_server_2019 >= 16.0.0 < 16.0.10417.20175`\n- `sharepoint_server_subscription_edition >= 16.0.0 < 16.0.19725.20434`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":49,"depthScoreParts":{"impact":48.4,"likelihood":0.2,"exploitation":0,"ransomware":0},"changes":[]}