A hypothetical man-in-the-middle attack would have allowed an attacker to hold users’ crypto for ransom on Trezor and KeepKey hardware wallets.
Source
Hardware Wallet Flaw Lets Attackers Hold Crypto for Ransom Without Touching Device

A hypothetical man-in-the-middle attack would have allowed an attacker to hold users’ crypto for ransom on Trezor and KeepKey hardware wallets.
Source