I wonder if and how badUSB affects devices like trezor... The only thing i could find on their "security threats" page that is somehow related to badUSB attack vectors is this :

"Reflashing the TREZOR with evil firmware

Official TREZOR firmware is signed by the SatoshiLabs master key. Installing unofficial firmware on the TREZOR is possible, but doing so will wipe the device storage and TREZOR will show a warning every time it starts. Reprogramming the bootloader is impossible, because all TREZORs ship with their secure programming fuse blown."