AI Assistant Vulnerability Exposed: CoSnitch Flaw Threatens User Data Security

A recently discovered vulnerability in Microsoft Copilot Personal has exposed how AI assistants can become security risks when pushed to their limits.

Researchers from Varonis Threat Labs dubbed the flaw 'CoSnitch' and reported it to Microsoft in December 2025.

Instead of using conventional technical analysis, the team used a 'meta-hacking' approach by socially engineering the AI's reasoning process until its answers exposed enough detail to make the exploit feasible.

The vulnerability allows attackers to extract information from linked accounts and alter the bot's long-term memory, making it a significant concern for users who rely on Copilot to manage their digital lives.

Microsoft has stated that users do not need to take action, as the company is already updating its 'guardrails' to strengthen protections against similar techniques.