URGENT SECURITY WARNING
A critical vulnerability has been discovered in how Coldcard devices generate seed phrases. If your Coldcard wallet uses a seed generated by the device itself, assume it may be compromised.
Move your Bitcoin to a new wallet immediately. Do not wait. Reports indicate that affected wallets are already being drained, and delaying could result in the permanent loss of your funds.
Exception: If you created your seed by rolling more than 50 dice (100 or more is preferred) and used that entropy instead of the Coldcard’s built-in seed generation, you are not affected by this vulnerability.
Effective immediately, we are withdrawing our recommendation for Coldcard wallets. We will be removing all Coldcard-related recommendations and content from our website over the coming days until this issue has been fully resolved and independently verified.