Coldcard Exploit Drains Millions in Bitcoin

An attacker recently exploited weak seed generation flaws in specific Coldcard hardware wallets, stealing millions of dollars worth of Bitcoin from hundreds of user addresses. Security researchers at Galaxy Research report that the actual theft happened in a fast, coordinated burst lasting about 25 minutes. Broader follow up analysis connects roughly 1,196 addresses to the incident.

This security breach highlights the vital importance of secure entropy and random number generation when setting up self custody hardware devices. While hardware wallets generally offer strong protection against online threats, issues during the initial wallet creation phase can leave funds exposed if seed phrases are predictable or compromised.

Traders and holders using hardware wallets should review their setup procedures and ensure they follow best practices for firmware updates and device initialization. Security teams are continuing to monitor related blockchain activity to track the stolen funds and protect the wider market from similar attacks.