Coldcard Flaw Drains Nearly $90 Million in Bitcoin From Thousands of Wallets

A five-year-old Coldcard firmware bug let attackers drain 1,367 BTC (~$89M) from 4,585 wallets across three waves, exposing gaps in hardware self-custody.

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Coldcard Flaw Drains Nearly $90 Million in Bitcoin From Thousands of Wallets
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