Coinkite Issues Coldcard Mk3 Security Warning, Suspected to Be Related to $38 Million Bitcoin Theft Incident

TechFlow news, July 31, according to Cointelegraph, Canadian Bitcoin hardware wallet manufacturer Coinkite warned Coldcard Mk3 users to immediately migrate funds; affected firmware versions range from 4.0.1, released in March 2021, to the final version 5.0.3, while Mk4, Q, and Mk5 are unaffected. Meanwhile, Bitcoin security experts are investigating an unusual liquidation event involving 594.48 BTC (approximately $38.3 million), where 1,324 UTXOs were transferred through 500 transactions within three blocks, and all addresses are single-signature addresses.