CVE-2026-24299: Improper neutralization of special elements used in a command ('command injection') in M365 Copilot allows an unauthoriz

CVE-2026-24299 is a command injection vulnerability (a flaw where an attacker can insert malicious commands into an application by exploiting improper handling of special characters) in Microsoft 365 Copilot that allows an unauthorized attacker to disclose information over a network. The vulnerability has a CVSS 4.0 severity rating (a 0-10 scale measuring how serious a security flaw is). This is hosted exclusively as a service by Microsoft.