A critical firmware vulnerability in Coldcard Mk3 hardware wallets (and potentially later models) allowed attackers to exploit weak entropy in seed generation. The exploit drained 1,082 BTC worth around $70 million from 1,196 addresses in just 41 minutes — 30 hours before Coinkite issued a public warning. This marks the third-largest crypto hack of 2026 and has raised fresh concerns over self-custody security, while also adding selling pressure on Bitcoin. Users with affected devices should take immediate precautions. DYOR. #Bitcoin #Coldcard #CryptoSecurity
Alizeh AliShare
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