Incidents tagged EchoLeak

A critical zero-click vulnerability, dubbed "EchoLeak" and identified as CVE-2025-32711, was discovered in Microsoft Copilot. This flaw leveraged an "LLM scope violation" to allow remote attackers to exfiltrate sensitive data from Microsoft 365 services without any user interaction.

Researchers have uncovered "EchoLeak," a critical zero-click vulnerability in Microsoft 365 Copilot that exploits design flaws inherent to Retrieval Augmented Generation (RAG) applications. This flaw, leveraging an "LLM Scope Violation" technique, allows for the automatic exfiltration of sensitive corporate data from the LLM's context without requiring user interaction.

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.