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A security vulnerability has been discovered that allows hackers to reactivate expired credit cards, known as "zombie cards," making them easier to use in financial fraud even after they have been closed or replaced. The flaw relies on exploiting the fact that the bank account linked to the card does not expire along with the card itself. Attackers use a wireless attack via Near Field Communication (NFC) technology with two smartphones, where they modify the fake expiration date of the card and pass it through the payment system. Studies have shown that some payment systems do not verify whether the data matches the actual expiration date, facilitating fraudulent activities. Experts advise not to neglect destroying expired cards by damaging the magnetic strip and the smart chip, and recommend regularly monitoring bank accounts.
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