Laser Attack Resets Tangem Wallet Passwords on Cards That Can't Be Patched
Researchers at Ledger's Donjon security team  have shown that a precisely timed laser pulse, aimed at the chip inside a Tangem crypto wallet card, can reset the card's password to anything the attacker picks. No old password. No backup card. Once it is reset, whoever did it controls the wallet and can move the coins out. This is not an emergency for most owners. The attack needs the physical card in hand and a lab that Donjon puts at around $250,000. It also means cutting the card open, which leaves damage no one can miss. It cannot be done over the internet, and there is no fix coming: Tangem cards cannot take software updates, so every card already sold carries the flaw. The one group that should act now is anyone whose card is lost or stolen and holds serious value. How the card is meant to protect you A Tangem wallet looks like a plain bank card. Tap it to your phone, and a companion app talks to a Samsung S3D232A chip inside. That chip is a ...
î Jul 10, 2026