Voicemail systems have had some of the same weaknesses for decades, and hackers could use those to break into PayPal and WhatsApp accounts

With just a simple script and a $40 virtual phone number, a hacker could automatically break into voicemail accounts at scale, and parlay that access into control over online accounts including WhatsApp or PayPal, or even track someone’s every move.

Martin Vigo, a Spanish hacker who works in mobile security, presented new research at the Def Con hacking conference in Las Vegas, demonstrating how easy it could be for a motivated attacker to break into phone voicemails, and how much more damaging that security breach could be than simply letting an attacker listen to messages.

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Read More Hackers accessing PayPal via voicemail? Security expert says it’s possible

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