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Coldcard Wallets Leaked 594 Bitcoin | Bitcoin and Crypto News
Description
A massive $38M Bitcoin heist unfolded thanks to a critical flaw in Coldcard Mk3 wallets—devices that were generating predictable seed phrases instead of true randomness, exposing dormant wallets to theft. The bug, introduced in March 2021, allowed attackers to sweep 594 BTC in just 25 minutes across hundreds of transactions. Affected wallets were single-signature and held over 0.15 BTC, with coins dating back to 2021. The flaw stemmed from a build setting that bypassed hardware randomness, relying on predictable chip data. Coinkite warns users who generated seeds on affected devices, while newer models (Mk4, Q, Mk5) appear safe. Despite the colossal loss, Bitcoin’s price remained stable—highlighting how deep this vulnerability went, even impacting paper wallet keys and other sensitive data.
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