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Bitcoin self-custody at risk after Coldcard exploit drains over $83 million

A Coldcard firmware bug generated weak seeds since 2021, enabling theft of over 1,300 BTC worth $83M. CasaHODL CTO Lopp weighs in on self-custody

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Bitcoin self-custody at risk after Coldcard exploit drains over $83 million

Coldcard firmware bug (v4.0.1–4.1.9) generated weak seeds enabling $83M theft of 1,300+ BTC remotely. It accelerates multi-signature adoption—distributed keys across devices eliminate single-point failures from firmware regressions or supply-chain attacks.

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sabato 1 agosto 2026·cryptobriefing.com
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.
sabato 1 agosto 2026·thehackernews.com
Coldcard Hardware Wallet Flaw Linked to $70 Million Bitcoin Theft in 41 Minutes
A Coldcard firmware flaw weakens wallet seed generation across five models, while Galaxy links a 1,196-address, $70.2 million sweep to the bug.

Bitcoin self-custody at risk after Coldcard exploit drains over $83 million

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Bitcoin self-custody at risk after Coldcard exploit drains over $83 million

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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

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

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

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

Jameson Lopp says Coldcard exploit exposes limits of Bitcoin's 'don't trust, verify' mantra

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

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

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

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

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

Coldcard Hacker Gets Brazen Bitcoin Laundering Offer Onchain

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

Bitcoin Worth $86 Million Stolen From Coldcard Crypto Wallets, Company Halts Shipments, Destroys Remainin

Hackers hit Bitcoin’s safest hiding place in ongoing attack - The Economic Times

Hackers hit Bitcoin’s safest hiding place in ongoing attack

Coldcard breach: How hackers stole $89M from Bitcoin's 'safest' storage

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

Coldcard Bitcoin Theft Continues, Estimated Over $114 Million Stolen

Bitcoin community responds swiftly to Coldcard exploit as 1,367 BTC drained from vulnerable wallets

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

Bitcoin owners rocked by $116 million hack: What we know about the Coldcard exploit | Fortune

Jameson Lopp says Coldcard exploit exposes limits of Bitcoin's 'don't trust, verify' mantra