Coldcard Hardware Wallet Flaw Linked to $70.2 Million Bitcoin Theft

Executive Briefing

• Reveals a firmware vulnerability in five Coldcard wallet models that weakens seed generation security
• Exposes how attackers swept 1,196 addresses in 41 minutes, stealing $70.2 million in Bitcoin
• Links the breach to predictable entropy in wallet seed creation, making private keys guessable
• Urges Coldcard users on affected firmware versions to transfer funds and generate new wallets immediately