EchoLeak: How Zero-Click Attacks Expose AI Security Risks in Microsoft 365 Copilot Picture an email so unremarkable you never open it, yet it silently triggers your AI assistant to leak confidential corporate data. This unsettling scenario became reality with EchoLeak, the first zer... AI security Content Security Policy Data exfiltration Enterprise IT Microsoft Copilot Prompt injection Vulnerabilities Zero-click attacks