That update introduced a coding error in how the wallet generated seed phrases — the master password that controls access to your Bitcoin. Hardware wallets became a symbol of financial sovereignty. What Coldcard Users Should Do Right NowIf you created a seed on a Coldcard Mk3 running firmware 4.0.1 or later, treat your wallet as compromised. Are other hardware wallets like Trezor or Ledger affected by this exploit? That said, every hardware wallet relies on firmware that could contain undiscovered bugs, which is why regular updates and multi-layer security practices matter for all devices.