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

A flaw in Coldcard's firmware has put the spotlight on a basic part of wallet security: how the device generates its seed in the first place. The...

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

Coldcard firmware bug (2021) used weak pseudorandom, enabling $88M theft from 4,585 addresses via remote seed derivation. For IT evaluating crypto custody, this reveals hardware wallet security depends on firmware quality, not physical isolation from attackers.

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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.

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

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

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

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

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

Coldcard exploit reignites Bitcoin self-custody debate after $38 million theft

$38M in Bitcoin Drained by Coldcard Key Flaw Its Maker Thinks AI Found - Decrypt

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

Coldcard Wallet Flaw Exposes Years Of Bitcoin Seeds After $70M In BTC Stolen

COLDCARD SECURITY RISK: IMMEDIATE ACTION REQUIRED

Coldcard exploit reignites Bitcoin self-custody debate after $38 million theft

Coldcard Bug Exposes The New Reality: AI Is Auditing Every Open-Source Wallet

Bitcoin losses linked to Coldcard vulnerability grow to $70 million, Galaxy Research says

Coldcard Bitcoin Thief Likely Used Top Blockchain Services Provider

Coldcard Attacker Stole $30M in 10 Minutes by Targeting Big Wallets

Block traces COLDCARD attacker to blockchain services provider after $38M Bitcoin theft

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

CZ Warns Bitcoin Holders After $70 Million Wallet Exploit: 'Nothing Is 100%' - Decrypt

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