{"id":"CVE-2026-47645","title":"Microsoft 365 Copilot's Business Chat Elevation of Privilege Vulnerability","summary":"Url redirection to untrusted site ('open redirect') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to elevate privileges over a network.","severity":"high","cvss":8.8,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C","cvssSource":"cna","cwe":["CWE-601"],"vendor":"Microsoft","product":"Microsoft 365 Copilot","affected":["365_copilot -"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"total","timestamp":"2026-06-23T00:00:00+00:00"},"published":"2026-06-19","updated":"2026-09-24","sourceUpdated":"2026-09-24T13:45:19.436Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-47645","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-47645","label":"Microsoft 365 Copilot's Business Chat Elevation of Privilege Vulnerability"}],"tags":["cve.org"],"epss":0.00758,"epssPercentile":0.5375,"ingestedAt":"2026-09-24T14:44:21.356Z","slug":"CVE-2026-47645","body":"## Overview\n\nUrl redirection to untrusted site ('open redirect') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to elevate privileges over a network.\n\n## Affected\n\n- `365_copilot -`\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":[]}