**Microsoft Copilot Hack: The One-Click Way to Steal User Data**
I’m still trying to process the shocking discovery made by Varonis Risk Labs. It turns out that there’s a security flaw in Microsoft Copilot that allows hackers to steal sensitive user data with just one click. The attack method is called “Reprompt” and it’s a game-changer for cybercriminals.
So, how does it work? Well, it’s a multi-step process that involves chaining requests, parameter-to-immediate (P2P) injection, and a clever double-request technique. Essentially, an attacker can send a malicious link to a user, which will prompt Copilot to run a series of instructions that bypasses security controls. It’s like a reverse social engineering attack.
The Reprompt hack is a masterclass in exploiting vulnerabilities. By manipulating the URL parameter ‘q’, an attacker can inject malicious code that will run as if it were a legitimate user prompt. This means that even if a user is using a secure browser or antivirus software, the attack can still succeed.
So, what did Microsoft do about it? Well, they got wind of the vulnerability in August 2025 and patched it quickly. The fix was officially released on January 13, 2026. Microsoft is advising users to be extra cautious when clicking on links and to keep an eye out for unusual requests from Copilot.
It’s a sobering reminder that even the most secure systems are not immune to hacking. As always, it’s essential to stay vigilant and keep your software up to date.
Read the full article at [Source link](https://nyheter.aitool.se/reprompt-hackare-kunde-med-ett-klick-stjala-anvandardata-fran-copilot/)
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