EchoLeak is a new zero-click AI vulnerability in Microsoft 365 Copilot that allows unauthorized data exfiltration without user interaction. Addressed by Microsoft, this flaw highlights the risks of LLM scope violations and tool poisoning attacks in enterprise AI systems. #EchoLeak #M365Copilot #CVEsecurity
Keypoints
- EchoLeak exploits an AI command injection vulnerability in M365 Copilot to exfiltrate sensitive data covertly.
- The attack uses untrusted email content to trigger scope violations within the AI, leaking data via SharePoint and Teams.
- Microsoft has patched the flaw under CVE-2025-32711, with no known exploits in the wild to date.
- Tool poisoning and ATPA threats pose significant risks to AI tool integrations like MCP, especially through schema vulnerabilities.
- DNS rebinding attacks exploit MCP’s real-time protocols, enabling internal network access and data theft through malicious websites.
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