Event Brief
Researchers show “Zombie Card” attack on expired Visa
By The BriefBrief · Sources (2)
Filed: Aug 23, 2026 at 12:06 PM ET
Summary: Researchers at the University of Massachusetts Amherst disclosed a security flaw that can let criminals use expired Visa contactless cards to make unauthorized in-store purchases. The “Zombie Card” method uses two smartphones as a relay to exploit how Visa links expiration dates between payment terminals and issuing banks.
WHO: Researchers at the University of Massachusetts Amherst
WHAT: Disclosure of a “Zombie Card” attack that can revive expired Visa contactless cards for unauthorized purchases using a two-smartphone relay.
WHEN: Aug 23, 2026
WHERE: Location not specified
WHY: The attack exploits a weakness in how Visa handles expiration dates in tap-to-pay transactions, allowing the terminal and issuing bank to see different expiration dates.
ℹ️ This event is analyzed using pattern arcs, velocity indicators, and source analysis in our MI Console.
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