Security researchers uncovered “EchoLeak,” a zero-click flaw in Microsoft 365 Copilot, exposing sensitive data without user action. Microsoft has mitigated the vulnerability.

EchoLeak marks the first known zero-click attack on an AI agent (via Fortune). The cybersecurity firm presented its findings to Microsoft earlier this year in January.

The vulnerability, called “EchoLeak,” lets attackers “automatically exfiltrate sensitive and proprietary information” from Microsoft 365 Copilot without knowledge of the user, according to findings ...

Echoes beyond Microsoft “EchoLeak marks a shift to assumption-of-compromise architectures,” Garg stated. “Enterprises must now assume adversarial prompt injection will occur, making real ...

A new attack dubbed 'EchoLeak' is the first known zero-click AI vulnerability that enables attackers to exfiltrate sensitive data from Microsoft 365 Copilot from a user's context without interaction.

The researchers at Aim Security dubbed the flaw “EchoLeak.” Microsoft told Fortune that it has already fixed the issue in Microsoft 365 Copilot and that its customers were unaffected.

Microsoft has fixed a dangerous zero-click attack in its Generative Artificial Intelligence (GenAI) model which could have allowed threat actors to silently exfiltrate sensitive corporate data without ...

EchoLeak affected Microsoft 365 Copilot, the AI assistant integrated across several Office applications, including Word, Excel, Outlook, PowerPoint, and Teams. According to researchers at Aim ...

What This Vulnerability Teaches Us About AI SecurityThe recent disclosure of EchoLeak by Aim Labs marks a significant milestone in AI security research. As the first documented zero-click exploit ...

The vulnerability, dubbed EchoLeak and assigned the identifier CVE-2025-32711, could have allowed hackers to mount an attack without the target user having to do anything.EchoLeak represents the ...