COLDCARD Seed Generation Flaw Linked to Nearly $89 Million Bitcoin Theft
A firmware error that weakened wallet seed generation in several COLDCARD hardware wallets has been linked to three suspected Bitcoin thefts involving 1,367.05 BTC. Galaxy Research, the research division of digital assets company Galaxy, valued the observed losses at about $88.6 million.
The initial theft occurred on July 30, when 1,082.65 BTC was removed from 1,196 addresses within 41 minutes. According to Galaxy Research’s blockchain analysis on X, the transactions shared identical fees and lacked change outputs, indicating that one operator may have conducted the sweep.
Two later suspected attacks brought the observed total to 4,585 drained addresses. The third involved 207.7294 BTC taken from 1,912 addresses, with the attacker using separate destination addresses and different transaction formats that made the activity harder to group.
Galaxy has cautioned that its findings come from Bitcoin blockchain dataand the unspent transaction output set. The company has not confirmed that every affected...
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