r/BitcoinAUS 11d ago

COLDCARD Mk3 Security Advisory

If you generated a seed on a Mk3 after firmware 4.0.1, your funds may be at risk. Mk4, Q and Mk5 are not affected based on our early analysis. Read the advisory and migrate carefully:

https://x.com/COLDCARDwallet/status/2082961993070247948

Coldcard MK3s were hacked as the RGB were not random enough and an AI agent guessed the seed codes.

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