Key facts
- A security vulnerability has been identified in the Coldcard Mk4 hardware wallet.
- Users of the Coldcard Mk4 are urged to take immediate action to secure their Bitcoin.
- The method used by the thief likely involved a prominent blockchain services provider.
A security vulnerability has been identified in the Coldcard Mk4 hardware wallet, prompting urgent action from users. Experts are advising individuals holding Bitcoin on this device to transfer their funds immediately to mitigate potential losses. Reports suggest that the individual or group responsible for exploiting this vulnerability likely utilized a top-tier blockchain services provider in their operation.