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How bitcoin cold wallets lost $70 million in an attack that never touched the devices

Galaxy Research said weak seed generation let an attacker recreate likely private keys offline, sweep more than 1,000 BTC from nearly 1,200 wallets and continue searching without ever accessing the devices.

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coindesk.comStai leggendo2 g fa

How bitcoin cold wallets lost $70 million in an attack that never touched the devices

Coldcard firmware bug reduced seed randomness to 4B enumerable possibilities; $70M drained from 1.196 wallets via brute force without device contact. Hardware wallet security model cracks when seed generation fails—key recovery shifts from network breach to computational reconstruction.

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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·coindesk.com
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.

How bitcoin cold wallets lost $70 million in an attack that never touched the devices

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How bitcoin cold wallets lost $70 million in an attack that never touched the devices

Timeline cronologica

Coldcard Mk3 Warning Amid Unexplained 594 BTC Sweep

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

Coldcard Hardware Wallet Flaw Linked to $70 Million Bitcoin Theft in 41 Minutes

Hackers exploit Coldcard firmware flaw, stealing $89 million in Bitcoin from thousands of wallets

A Coldcard firmware flaw let hackers drain $70 million in Bitcoin in 41 minutes, with losses now topping $88…

Coldcard hack steals $86 million in bitcoin from more than 4,500 wallets

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The Coldcard Exploit Explained: Who Lost Bitcoin and Who's at Risk

How bitcoin cold wallets lost $70 million in an attack that never touched the devices

Galaxy Maps Coldcard Bitcoin Losses After Wallet Incident

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Was AI Responsible for Finding the Coldcard Security Flaw?

Binance's CZ warns users to split funds after $70M Coldcard exploit

Coldcard Hardware Wallet Flaw Linked to $70 Million Bitcoin Theft in 41 Minutes

Bitcoin cold-wallet attack spreads to 4,500 addresses as losses near $89 million

Galaxy Research identifies 1,367 BTC drained in attacks on Coldcard addresses

"Nothing Is 100%": CZ Warns Bitcoin Holders After $89 Million Coldcard Wallet Exploit