{"id":"CVE-2026-70306","title":"Microsoft Office SharePoint Spoofing Vulnerability","summary":"Improper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an unauthorized attacker to perform spoofing over a network.","severity":"critical","cvss":9.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/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":"2026-08-11T17:55:34.567011Z"},"published":"2026-08-11","updated":"2026-09-16","sourceUpdated":"2026-09-16T16:26:45.368Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-70306","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70306","label":"Microsoft Office SharePoint Spoofing Vulnerability"}],"tags":["cve.org"],"epss":0.00749,"epssPercentile":0.52981,"ingestedAt":"2026-09-08T19:08:49.646Z","slug":"CVE-2026-70306","body":"## Overview\n\nImproper neutralization of input during web page generation ('cross-site scripting') in Microsoft Office SharePoint allows an unauthorized 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":"midnight","depthScore":51,"depthScoreParts":{"impact":51.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}