A hypothetical man-in-the-middle attack would have allowed an attacker to hold users’ crypto for ransom on Trezor and KeepKey hardware wallets.
Kraken: $75 Device Will Get You Into Crypto Hardware Wallet KeepKey
Kraken Security Labs said crypto hardware wallet KeepKey is not doing enough to protect customers from physical attacks, saying it was able to get into the system using a $75 device.