
Zombie Card Attack Revives Expired Visa Cards for Contactless NFC Payments
Researchers from the University of Massachusetts Amherst have demonstrated the Zombie Card attack, which enables contactless payments with certain expired Visa cards over NFC without breaking cryptography or cloning the card. The technique exploits inconsistencies in how payment terminals and issuing banks validate card expiration dates within the EMV protocol. By deploying two Android smartphones as a relay between the expired card and the terminal, the researchers intercepted the EMV field containing the expiration date and substituted a future date during the transaction. The terminal accepted the locally validated payment while the cryptographic data remained valid because Visa EMV Kernel 3 does not always bind the expiration field to the protected cryptogram. Testing showed varying bank responses: one issuer approved transactions of different amounts at multiple merchants, while another consistently declined them. The attack failed against Mastercard, American Express, and Discover due to stricter cross-checks or cryptographic protection of the expiration data. The method requires an active account and valid keys on the expired card, making it more complex than traditional skimming.
AntiMalwareAug 21, 2026Translated from Russian

