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Major bitcoin wallet flaw drains 594 BTC in 25-minute sweep

A hardware wallet randomness bug turned “impossible to guess” seeds into guessable ones, and $38 million is already gone.

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coindesk.comStai leggendo3 g fa

Major bitcoin wallet flaw drains 594 BTC in 25-minute sweep

Coldcard firmware 4.0.0 (March 2021) enabled 594 BTC theft ($38M) from 500 dormant wallets in 25 minutes via predictable key generation. Treasury teams need multi-sig custody and firmware audits—consumer hardware alone fails compliance-grade crypto governance.

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venerdì 31 luglio 2026·cointelegraph.com
Coldcard Mk3 Warning Amid Unexplained 594 BTC Sweep
Bitcoin security experts said the unexplained $38 million wallet drain may involve flawed seed-generation entropy, though the cause and any Coldcard link remain unconfirmed.
venerdì 31 luglio 2026·news.bitcoin.com
Coinkite Warns Coldcard Mk3 Owners After Reports of $38M Bitcoin Loss
Coinkite warns Coldcard Mk3 owners of a seed generation risk after reports of $38 million in bitcoin leaving old wallets.

Major bitcoin wallet flaw drains 594 BTC in 25-minute sweep

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Major bitcoin wallet flaw drains 594 BTC in 25-minute sweep

Timeline cronologica

Coldcard Mk3 Warning Amid Unexplained 594 BTC Sweep

Coinkite Warns Coldcard Mk3 Owners After Reports of $38M Bitcoin Loss

Coinkite reports $38M in Bitcoin drained due to Coldcard key generation flaw

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