A critical "EchoLeak" zero-click vulnerability in Microsoft 365 Copilot allowed attackers to remotely exfiltrate sensitive internal data by sending emails containing hidden instructions. This flaw represents an LLM scope violation where the AI agent was tricked into accessing information beyond its intended permissions without user interaction.
Why This Matters
Publisher reporting describes a security event affecting echoleak. BugSkan could not yet bind a CVE or affected version, so treat the source details as the current record.
Recommended Action
Confirm whether Copilot is present in your environment and review vendor guidance for this report. Apply available patches or mitigations if your deployment matches the described conditions.
Affected