Coldcard Hardware Wallet Flaw Linked to $70 Million Bitcoin Theft in 41 Minutes

A firmware flaw in Coldcard hardware wallets, made by Coinkite, was linked to a $70.2 million Bitcoin theft involving 1,082.65 BTC drained from 1,196 addresses in 41 minutes on July 30. Galaxy Research traced the attack to a March 2021 integration error that used a deterministic software pseudorandom number generator for seed generation.