{"id":"CVE-2026-64900","title":"Microsoft SharePoint Server Spoofing Vulnerability","summary":"Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.","severity":"high","cvss":7.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C","cvssSource":"cna","cwe":["CWE-79"],"vendor":"Microsoft","product":"Microsoft SharePoint Enterprise Server 2016","affected":["sharepoint_enterprise_server_2016 >= 16.0.0 < 16.0.5565.1001","sharepoint_server_2019 >= 16.0.0 < 16.0.10417.20198","sharepoint_server_subscription_edition >= 16.0.0 < 16.0.19725.20522"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-08-12T15:57:24.325757Z"},"published":"2026-08-11","updated":"2026-09-16","sourceUpdated":"2026-09-16T16:26:08.756Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-64900","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-64900","label":"Microsoft SharePoint Server Spoofing Vulnerability"}],"tags":["cve.org"],"epss":0.00446,"epssPercentile":0.38093,"ingestedAt":"2026-09-08T18:07:34.889Z","slug":"CVE-2026-64900","body":"## Overview\n\nImproper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an authorized attacker to perform spoofing over a network.\n\n## Affected\n\n- `sharepoint_enterprise_server_2016 >= 16.0.0 < 16.0.5565.1001`\n- `sharepoint_server_2019 >= 16.0.0 < 16.0.10417.20198`\n- `sharepoint_server_subscription_edition >= 16.0.0 < 16.0.19725.20522`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":40,"depthScoreParts":{"impact":40.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}