Copilot Tricked Into Telling Reseachers How to Hack Itself

Microsoft Copilot reveals secret input that allowed it to be hacked

It’s not every day that attackers can force a frontier AI model to cough up user passwords and other sensitive data without user confirmation. That’s exactly what researchers recently did to Microsoft 365 Copilot Enterprise. Even more unusual is the source they tapped to discover the critical vulnerability that made their exploit possible. Rather than employing reverse engineering or other traditional vulnerability-hunting methods, they asked Co…

Copilot tricked into telling reseachers how to hack itself

Researchers manipulated Microsoft Copilot Personal into telling them how to hack the AI assistant – eventually tricking it into sending sensitive data to an external server and poisoning its persistent memory, by repeatedly asking Copilot why an attack wouldn’t work. Varonis Threat Labs uncovered the vulnerability, which they named "CoSnitch" and reported to Microsoft in December 2025. Redmond, we’re told, planned to issue a patch and formally i…