Bitcoin Coldcard Hack Explained: 2026 Entropy Failure

<p>In July 2026, over 1,300 BTC (~$80M) was drained from 4,500+ Coldcard wallets due to a five-year firmware bug that silently reduced seed entropy to ~40 bits. Learn why dice-roll users stayed safe, how the flaw worked, and what affected holders must do now.</p><p><br />Produced by <em>Podcasted!</em>, Bitcoin TL;DR transforms complex Bitcoin content into engaging audio episodes. </p><p><em>Podcasted!</em> is a podcast-as-a-service. Check out podcasted.carrd.co or go directly to <a href="https://geyser.fund/project/podcasted" target="_blank" rel="ugc noopener noreferrer">https://geyser.fund/project/podcasted</a> to book your episode.</p><p><br />Disclaimer: Not every episode is a podcast-as-a-service. We also pick outstanding Bitcoin content ourselves, that we find worth highlighting on this show.</p>