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

Galaxy Research flagged a third wave of sweeps tied to weak Coldcard-generated keys, with the attacker now targeting smaller balances and changing how funds are collected onchain.

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Coldcard Bitcoin Exploit Balloons to $88 Million as Attackers Keep Draining Wallets - Decrypt

Coldcard March 2021 firmware flaw generates weak seed phrases; $88.6M stolen via LLM-orchestrated sweeps. Users fleeing self-custody to exchanges erode hardware wallet confidence, signaling governance risk for corporate crypto holdings.

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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.

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

Confronto fonti

Coldcard Bitcoin Exploit Balloons to $88 Million as Attackers Keep Draining Wallets - Decrypt

Timeline cronologica

Coldcard Mk3 Warning Amid Unexplained 594 BTC Sweep

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

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

Coldcard Thefts Near $114 Million as Fourth Attack Wave Hits | The Defiant

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

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

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

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 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

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

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

Coldcard Theft Balloons to $88M as Exchange Deposits Spike, Old BTC Moves

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

Coldcard Hack Expands as Bitcoin Losses Reach $88.6M

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

Coldcard Bitcoin Exploit Balloons to $88 Million as Attackers Keep Draining Wallets - Decrypt