Laser Attack Exposes Critical Vulnerability in Popular Cryptocurrency Wallet Cards

A New Type of Hardware Attack Emerges

Scientists working at Ledger's security division have uncovered a serious weakness in Tangem cryptocurrency wallet cards. By directing an extremely focused laser beam at the microchip inside these cards, attackers can completely erase the security password protecting stored digital assets. This means someone could take a Tangem card and, without knowing the original password, reset it to whatever they want and steal the cryptocurrency inside.

Think of it like someone using a laser to bypass the lock on a physical safe. Once the lock mechanism is disabled, they can simply open the door and take what's inside. In this case, the "safe" contains your digital coins and tokens worth potentially thousands or millions of dollars.

How Does This Attack Actually Work?

Tangem cards function similarly to a credit card but store cryptocurrency instead of bank account information. The chip inside contains encrypted data and security measures designed to protect your assets. The Ledger researchers discovered that applying a precisely aimed laser pulse at the right moment can cause the chip to malfunction in a very specific way—it forgets or resets the password protection entirely.

The attacker doesn't need your original password, a backup card, or any special knowledge of your account setup. Once the laser does its job, complete control transfers to whoever performed the attack. This is particularly dangerous because Tangem cards are designed to be offline storage, meaning they should theoretically be safer from digital hacking.

What This Means

This discovery reveals that even devices designed to be maximally secure can have physical vulnerabilities that bypass all their digital protections. It's a reminder that security is only as strong as its weakest link. While laser equipment capable of this precision attack isn't something most criminals have access to, sophisticated attackers or well-funded groups certainly could obtain it.

The vulnerability affects the physical integrity of hardware-based cryptocurrency storage. Unlike a hacked password, which might be recovered or changed, a laser attack leaves the device permanently compromised and under the attacker's control.

Why You Should Care

• If you own a Tangem card, your funds could theoretically be at risk if the card is physically stolen
• This shows that cryptocurrency holders can't rely entirely on any single storage method
• Hardware wallet manufacturers need to redesign their chips with better physical protections
• The attack demonstrates how digital security can be defeated through physical means

What You Can Do

If you use Tangem cards or similar hardware wallets, consider these steps:

• Store your cards securely—keep them in a locked location where they cannot be physically accessed by unauthorized people
• Use multiple storage methods—don't keep all cryptocurrency on a single device or card type
• Stay informed—watch for firmware updates or security patches from Tangem addressing this issue
• Consider alternatives—research other hardware wallet options while manufacturers address this vulnerability

This research is valuable because it forces the cryptocurrency industry to strengthen its defenses against physical attacks that most people never consider.