How ‘Reprompt’ Attack Let Hackers Steal Data From Microsoft Copilot

Varonis found a “Reprompt” attack that let a single link hijack Microsoft Copilot Personal sessions and exfiltrate data; ...

Reprompt attack hijacked Microsoft Copilot sessions for data theft

Researchers identified an attack method dubbed "Reprompt" that could allow attackers to infiltrate a user's Microsoft Copilot session and issue commands to exfiltrate sensitive data.
SecurityWeek

New ‘Reprompt’ Attack Silently Siphons Microsoft Copilot Data

The Reprompt Copilot attack bypassed the LLMs data leak protections, leading to stealth information exfiltration after the ...

How this one-click Copilot attack bypassed security controls - and what Microsoft did about it

Reprompt impacted Microsoft Copilot Personal and, according to the team, gave "threat actors an invisible entry point to perform a data‑exfiltration chain that bypasses enterprise security controls ...
Cyber Defense Magazine

Defending Against Data Exfiltration and Ransomware Attacks

Abstract "Double-extortion" ransomware attacks not only encrypt systems but also steal sensitive data. Traditional backups ...

South Korean giant Kyowon confirms data theft in ransomware attack

The Kyowon Group (Kyowon), a South Korean conglomerate, disclosed that a cyberattack has disrupted its operations and ...