An attacker has systematically drained 1,816 Bitcoin worth approximately USD 116 million from over 5,200 Coldcard hardware wallet addresses since July 30, exploiting a five-year-old firmware vulnerability that crippled the device’s random number generation. The breach, which accelerated through multiple coordinated waves of theft, exposes a critical vulnerability in the self-custody narrative that has anchored…
A five-year-old vulnerability in Coldcard hardware wallets has triggered three waves of coordinated attacks over the past week, with blockchain-monitoring firms now estimating total losses at more than $130 million in Bitcoin stolen from approximately 4,585 addresses. The exploit, which affected firmware version 4.0.1 released in March 2021, compromised the wallet seed generation process on…
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…
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…
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