Microsoft Copilot hit by “EchoLeak” zero-click exploit, letting attackers exfiltrate corporate data via hidden prompts without user action…

Rickler Feed (@rickler_feed), Apr 28, 2026, 08:18 UTC

Microsoft Copilot hit by “EchoLeak” zero-click exploit, letting attackers exfiltrate corporate data via hidden prompts without user action in first AI agent attack - 𝕏/@Chromia 🏷️ AI, Exploit, Microsoft 🕵️ @Z_3_r_o

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