COLDCARD(@COLDCARDwallet):🚨 COLDCARD SECURITY UPDATE [Jul 31, 9:40 EDT] Mk3 4.2.0 is now available. Affected seeds without ≥50 fair, independent, private dice rolls: 👉 Mk3 4.0.1–4.1.9 👉 Mk4/Mk5 <5.6.0 👉 Q <1.5.0Q Update first. Generate a new seed. Migrate carefully.

COLDCARD

@COLDCARDwallet

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

参加 December 2017

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COLDCARD@COLDCARDwallet

2026.07.31 13:43

🚨 COLDCARD SECURITY UPDATE [Jul 31, 9:40 EDT] Mk3 4.2.0 is now available. Affected seeds without ≥50 fair, independent, private dice rolls: 👉 Mk3 4.0.1–4.1.9 👉 Mk4/Mk5 <5.6.0 👉 Q <1.5.0Q Update first. Generate a new seed. Migrate carefully.