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A security vulnerability in Coldcard hardware wallets allowed hackers to steal $70 million worth of Bitcoin.

CybersecurityEconomicsTechnologyAug 1, 2026score 0.472 posts · 0 replies across 2 instances
A security vulnerability in Coldcard hardware wallets led to a significant Bitcoin theft, with estimates of $70 million stolen. The breach was due to faulty firmware that generated weak private keys, allowing hackers to access and drain funds.

Claims

A security vulnerability in Coldcard hardware wallets allowed hackers to steal $70 million worth of Bitcoin.
Parent: CybersecurityEntity: Coldcard hardware walletsImpact: negativeDate: Aug 1, 2026 - Aug 2, 2026Target: Security vulnerability in Coldcard hardware wallets

Source posts

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A mysterious hacker has stolen more than $70 million worth of Bitcoin from Coldcard hardware wallets: https://bitcoinmagazine.com/news/coldcard-wallet-exposed-after-bitcoin-hack The attackers exploited a vulnerability in the wallet's firmware that produced weak and easy to guess private keys: https://blog.coinkite.com/entropy-technical-backgrounder/
8 boosts · 7 favs · 0 replies · Aug 2, 2026
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Bitcoin hardware wallet Coldcard shipped a faulty firmware build, and hackers are now draining wallets; Galaxy Research estimates ~$70M stolen (Shaurya Malwa/CoinDesk) https://www.coindesk.com/tech/2026/08/01/how-bitcoin-cold-wallets-lost-usd70-million-in-an-attack-that-never-touched-the-devices http://www.techmeme.com/260801/p15#a260801p15
7 boosts · 0 favs · 0 replies · Aug 1, 2026