COLDCARD Mk3 firmware update 4.2.0 addresses seed entropy vulnerability.
Affected: Mk3 (4.0.1-4.1.9), Mk4/Mk5 (<5.6.0), Q (<1.5.0Q) if <50 private "dice roll" ops during seed gen.
Action:
1. Update firmware to latest.
2. Generate NEW seed.
3. Migrate funds CAUTIOUSLY.
This is CRITICAL for fund security. Act promptly! #coldcard #security #bitcoin #firmware
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