August 2, 2026·Bearish·critical issue

Coldcard Wallet Vulnerability Prompts Urgent Bitcoin Transfer Warning

A security researcher alleged Coldcard hardware wallets (Mk4, Mk5, Q) are vulnerable to hackers, urging users to move Bitcoin immediately. The social media warning claims hackers are actively exploiting the vulnerability and stealing funds. Coldcard has not responded; the threat's severity is unverified.

Detected & updated continuously · Source: Nebula

Mentioned

Bitcoin (btc)

@COLDCARDwallet

Sources

@jerimican5445

Please get your Bitcoin off of ALL COLDCARD Hardware Wallets ASAP because by the time you read this thread by @KLoaec , hackers will have stolen more Bitcoin off of Mk4, Mk5 and Q's This is gross negligence by engineers at COLDCARD!! Blame the COLDCARD engineers, not the plebs: