⚠️ $38M stolen from Coldcard wallets. An attacker exploited a flaw in Coldcard's key generation to steal 594 $BTC (~$38M) from around 500 single-signature wallets in a 25-minute sweep. The vulnerability affected wallet seeds generated on Coldcard Mk3 devices running firmware 4.0.1 or later. Coinkite says Mk4, Q, and Mk5 are not affected based on its early analysis. The attacker consolidated 562 $BTC into a single address, which has not moved.
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