Hardware Wallet Coin Isolation Bypass
TLDR: Security researcher monokh discovered a flaw in the isolation of the transaction logic between coins. It allows coins from one cryptocurrency, e.g. bitcoin, to be spent by the transaction flow of another, e.g. Litecoin. I found two other hardware wallets that are vulnerable to this exploit, Keepkey and Coldcard. To this day, Keepkey has not patched the issue.