Bitcoin Coldcard Wallets Hit by $89 Million Theft

A serious security threat is affecting Bitcoin users who rely on specific Coldcard hardware wallets. Researchers found a third wave of attacks that has expanded to 4,500 addresses. Total losses from these breaches have climbed toward $89 million as the perpetrator continues to drain funds.

The attacker is currently shifting tactics by targeting smaller wallet balances. This change suggests the threat actor is broadening their reach to capture remaining assets across the network. These issues stem from weak keys generated during the setup process for certain wallet versions.

Investors should verify the security of their storage methods immediately. If you have not updated your firmware or followed official security guidance for your hardware device, now is the time to do so. Keeping your recovery seeds offline and using reputable hardware remains the best defense against these ongoing automated sweeps.