{"id":"CVE-2026-78501","title":"Improper neutralization of special elements used in a command ('command injection') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to disclose information over a network.","summary":"Improper neutralization of special elements used in a command ('command injection') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to disclose information over a network.","severity":"high","cvss":7.4,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N","cwe":["CWE-77","CWE-923"],"vendor":"Microsoft","product":"Microsoft 365 Copilot's Business Chat","affected":["365_copilot_s_business_chat -"],"published":"2026-09-17","updated":"2026-09-18","sourceUpdated":"2026-09-18T15:17:13.427","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-78501","references":[{"url":"https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78501","label":"secure@microsoft.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-18T14:11:07.081015Z"},"epss":0.00487,"epssPercentile":0.40898,"ingestedAt":"2026-09-17T23:31:20.686Z","slug":"CVE-2026-78501","body":"## Overview\n\nImproper neutralization of special elements used in a command ('command injection') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to disclose information over a network.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":40.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}