COLDCARD(@COLDCARDwallet):The first post was the advisory and what users should do. This second post has the technical details: what actually went wrong, why our reviews missed it, the impact across Mk3/Mk4/Q/Mk5, and what we changed. https://t.co/HshUxevCl3 ( current evaluating Mk3 firmware release )

COLDCARD

@COLDCARDwallet

SECURITY ADVISORY ⚠️ check blogpost | The best #bitcoin# hardware wallet 🙌 Ultra-secure.The only dedicated air-gapped. Backup on SEEDPLATE from @Coinkite

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COLDCARD@COLDCARDwallet

2026.07.31 06:46

The first post was the advisory and what users should do. This second post has the technical details: what actually went wrong, why our reviews missed it, the impact across Mk3/Mk4/Q/Mk5, and what we changed. ( current evaluating Mk3 firmware release )