High severity8.6NVD Advisory· Published Sep 17, 2026· Updated Oct 14, 2026
CVE-2026-78501
CVE-2026-78501
Description
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.
Affected products
2- cpe:2.3:a:microsoft:365_copilot_chat:-:*:*:*:*:*:*:*
Patches
Vulnerability mechanics
References
1- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-78501nvdPatchVendor Advisory
News mentions
1- Microsoft: 24 Azure & AI Vulnerabilities Disclosed, Including Critical Privilege Escalation FlawsVypr Intelligence · Sep 18, 2026