TFTC(@TFTC21):Coinkite has issued a security advisory for Coldcard Mk3 users. If you generated a seed on a Mk3 running firmware 4.0.1 (March 2021) or later, your funds may be at risk. The issue appears to be related to the device's random number generator during seed creation. Mk4, Q, and Mk5 are not affected. If you used a BIP-39 passphrase on top of your Mk3 seed, Coinkite says the risk is minimal. If you didn't, you should migrate your funds to a new seed generated on an unaffected device. Don't rush. Send a test transaction first, verify the new wallet, then move the rest. More details from Coinkite's investigation are coming. Full advisory:

2026.07.30 23:11

Coinkite has issued a security advisory for Coldcard Mk3 users. If you generated a seed on a Mk3 running firmware 4.0.1 (March 2021) or later, your funds may be at risk. The issue appears to be related to the device's random number generator during seed creation. Mk4, Q, and Mk5 are not affected. If you used a BIP-39 passphrase on top of your Mk3 seed, Coinkite says the risk is minimal. If you didn't, you should migrate your funds to a new seed generated on an unaffected device. Don't rush. Send a test transaction first, verify the new wallet, then move the rest. More details from Coinkite's investigation are coming. Full advisory:

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