coinkite
$86M Coldcard Hack Reignites Self-Custody Security Debate
Approximately 1,367 Bitcoin worth $86 million to $89 million has been stolen from more than 4,500 Coldcard hardware wallet users following a firmware vulnerability discovered in devices manufactured by Canada-based Coinkite Inc. The breach, which unfolded in three distinct waves beginning July 30, 2026, has reignited debate over the security trade-offs inherent in self-custody while...
$75M Coldcard Hack Exposes 2021 Firmware Flaw, Tests Bitcoin Security
A $75 million Bitcoin theft from Coldcard hardware wallets exposed a critical firmware vulnerability dating back to March 2021, prompting an emergency response from manufacturer Coinkite and raising urgent questions about the security of devices that hold custody over billions in cryptocurrency. The attack, which unfolded across two waves and involved seed compromise affecting at...
Coldcard Hack Exposes $70M Vulnerability in Hardware Wallets
A critical vulnerability in Coldcard hardware wallets has exposed a design flaw that allowed attackers to steal approximately 594 bitcoins—worth roughly $38 million at theft time, though later analysis suggests the total may exceed $70 million—from nearly 500 single-signature wallets in a 25-minute window on July 30. The breach, disclosed by Canadian hardware wallet manufacturer...