Hupzy (Spot On Chain)|Jul 31, 2026 00:15
๐จ Coldcard Mk3 wallets on firmware 4.0.1โ5.0.3 have a ๐๐ฒ๐ฒ๐ฑ ๐ด๐ฒ๐ป๐ฒ๐ฟ๐ฎ๐๐ถ๐ผ๐ป ๐ณ๐น๐ฎ๐. 594 BTC stolen from hundreds of single-sig wallets. Coinkite urges all affected users to migrate funds immediately.
No confirmed link between the flaw and the theft yet, but the timing and scale are alarming. Migration instructions are on the official blog.
๐๐๐ฝ๐๐ ๐๐ฎ๐ธ๐ฒ: 594 BTC stolen is a major self-custody security incident. If the thief liquidates through exchanges, it creates localized ๐๐ฒ๐น๐น๐ถ๐ป๐ด ๐ฝ๐ฟ๐ฒ๐๐๐๐ฟ๐ฒ on BTC. Beyond the immediate theft, hardware wallet seed flaws erode trust in self-custody infrastructure โ particularly damaging when institutional adoption depends on custody being bulletproof. Any Coldcard Mk3 user on affected firmware should act now.
https://blog.coinkite.com/coldcard-mk3-seed-generation-warning/
https://x.com/WuBlockchain/status/2082979571625017596
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