A firmware entropy flaw in Coinkite’s Coldcard hardware wallet allowed an attacker to drain 1,196 Bitcoin addresses of 1,082.65 BTC worth approximately $70.2 million in a single 41-minute sweep on July 30, 2026. The theft occurred roughly 30 hours before the vendor issued its public security advisory. On-chain analysts traced the drain to blocks 960,183 […]
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