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Coldcard Loses $70M In 41 Minutes As CZ Warns Hardware Wallets Can Fail

DevelopingCryptoSecurity incidentFirst tracked 2026-10-08Last changed 2026-10-22

Current outcome

Coinkite and its co-founders face a proposed class action in Ontario, Canada, alleging Coldcard's standard firmware used a predictable pseudo-random number generator that made seed phrases reproducible and left users' bitcoin vulnerable, with claims under consumer protection and sale-of-goods law plus negligence and breach of contract.

Progress timeline

2 material updates
  1. #01
    Initial2026-10-08 11:28 · publication time

    Coldcard Loses $70M In 41 Minutes As CZ Warns Hardware Wallets Can Fail

    Coldcard hardware-wallet users reportedly lost about $70M in 41 minutes during a security incident, prompting Binance's CZ to warn that hardware wallets can fail.

    Source evidence: Yellow.com

  2. #02
    Escalation2026-10-22 04:53 · publication time

    【Coldcard 制造商 Coinkite 因固件随机数漏洞在加拿大面临集体诉讼】

    Coinkite and its co-founders face a proposed class action in Ontario, Canada, alleging Coldcard's standard firmware used a predictable pseudo-random number generator that made seed phrases reproducible and left users' bitcoin vulnerable, with claims under consumer protection and sale-of-goods law plus negligence and breach of contract.

    Source evidence: foresightnews · theblockbeats

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