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

A Coldcard Mk3 firmware flaw drained up to 1,082 BTC in 41 minutes. CZ urges users to split funds as self-custody confidence takes a major hit.

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cryptobriefing.com22 h fa

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

Coldcard firmware bug (versions 4.0.1–4.1.9) substituted software for hardware RNG in seed generation, enabling $89M theft from 4,585 addresses (July 2026). Self-custody risk now extends to firmware integrity; BIP-39 passphrases and supply-chain audits essential.

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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·theblock.co
'Funds may be at risk': Coinkite issues warning for Coldcard Mk3 users amid 594 BTC theft reports
Coinkite recommends that Mk3 users create a strong, unique BIP-39 passphrase on the device and move funds to the resulting wallet.

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

Confronto fonti

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

Timeline cronologica

Coldcard Mk3 Warning Amid Unexplained 594 BTC Sweep

'Funds may be at risk': Coinkite issues warning for Coldcard Mk3 users amid 594 BTC theft reports

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

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

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

CZ calls for wallet diversification after $70 million Coldcard exploit

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

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

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

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

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 calls for wallet diversification after $70 million Coldcard exploit

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

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

Sicurezza wallet crypto: la falla di Coldcard

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