Hardware Wallet Security: 3 Attacks That Bypass the UI

Hardware Wallet Security: 3 Attacks That Bypass the UI

Hardware wallets promise "unhackable" private key storage. But that screen showing your transaction details? It's not always telling you the truth.

I tested three attack vectors against popular hardware wallets — address replacement, malicious firmware, and supply chain tampering. Two of them worked even when I verified addresses on the device screen. The third required physical access for under 90 seconds.

Here's what actually protects your crypto, and what's just security theater.

Photo by Morthy Jameson on Pexels

The Trusted Display Problem

Every hardware wallet tutorial tells you the same thing: "Always verify the address on the device screen before sending." Sound advice. Except it assumes the device is showing you accurate information.

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