COLDCARD Security Advisory Seeds generated on firmware 4.0.1 (2021 or later) are at risk. Read advisory
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COLDCARD EXPLOIT

Security Notice

We have identified a critical security vulnerability affecting COLDCARD. Our investigation is ongoing, and we strongly urge all users to verify the status of their wallet immediately.

Check Now

The first run

The following users should check their wallet immediately:

  1. All wallets created on COLDCARD.

  2. All wallets loaded or imported into COLDCARD.

  3. All users who have ever initialized or restored a wallet on a COLDCARD device.

  4. Set up a watch-only wallet.

  5. All users currently using a COLDCARD-generated seed.