tech 🚨 Zombie Card trick revives expired Visa contactless cards
Researchers at the University of Massachusetts Amherst demonstrated the "Zombie Card" attack to revive expired Visa contactless cards for in-store purchases. This exploit was tested against five major US banks, focusing on EMV transactions on August 12 to 14, 2026. The attack succeeds by rewriting the expiration date read by the POS terminal without breaking cryptography. Bank A allowed the date modification and accepted multiple cards simultaneously. The findings were disclosed in May 2025, highlighting a critical security gap. 💳