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COLDCARD wallet RNG flaw likely linked to $88 million Bitcoin theft

A vulnerability in COLDCARD hardware wallet firmware allowed attackers to steal an estimated $88.6 million in Bitcoin from thousands of wallets whose seeds were generated using a flawed random number generator.

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COLDCARD wallet RNG flaw likely linked to $88 million Bitcoin theft

Attackers exploited COLDCARD wallet firmware's RNG bug to generate seed keys offline and steal $88.6M (1,367 BTC) from 4,585 addresses. For CIOs managing crypto assets: trusted hardware requires independent audit and mandatory seed migration—this incident exposes a critical supply-chain gap in cryptographic controls.

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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.

COLDCARD wallet RNG flaw likely linked to $88 million Bitcoin theft

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COLDCARD wallet RNG flaw likely linked to $88 million Bitcoin theft

Timeline cronologica

Coldcard Mk3 Warning Amid Unexplained 594 BTC Sweep

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

COLDCARD Predictable RNG: From Seed Recovery to About $8.86M Bitcoin Theft

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

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

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

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

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

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

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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

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