SECURITYBITCOIN MAGAZINE
COLDCARD SECURITY RISK: IMMEDIATE ACTION REQUIRED
Coldcard wallets (MK3, MK4, MK5, Q) have a critical security vulnerability allowing attackers to brute-force seed phrases if generated without sufficient entropy (e.g., 50+ dice rolls). Funds are actively being drained, with 1000 BTC reported moved. Immediate action is required to move funds to secure wallets, use passphrases, or adopt alternatives like Nunchuck.
Mentioned
Related Signal
Adjacent reporting
- ‘Funds may be at risk’: Coinkite issues warning for Coldcard Mk3 users amid 594 BTC theft reports
- Coldcard Wallet Flaw Exposes Years of Bitcoin Seeds After $70M in BTC Stolen
- Coldcard issues Mk3 warning as experts examine $38M Bitcoin wallet drain
- Cold Wallet Upgrade Recommendation?
- $38M in Bitcoin Drained by Coldcard Key Flaw Its Maker Thinks AI Found