Coldcard Hardware Wallet Flaw Linked to $70 Million Bitcoin Theft in 41 Minutes

The Hacker News 1 August 2026, 20:17 EEST Security

An attacker drained 1,196 Bitcoin addresses in 41 minutes on July 30, taking 1,082.65 BTC worth about $70.2 million at the time. Galaxy Research mapped the sweep and tied it to a firmware flaw in Coldcard, the Bitcoin-only hardware wallet made by Canadian firm Coinkite. A March 2021 firmware integration error routed seed generation to a deterministic software pseudorandom number generator (PRNG…

Read the full story on The Hacker News https://thehackernews.com/2026/08/coldcard-hardware-wallet-flaw-linked-to.html

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