Coldcard Exploit Exposes Bitcoin Self-Custody Vulnerabilities

Crypto analyst Benjamin Cowen has lamented that cryptocurrencies continue to struggle with trust among the general public due to frequent security flaws and scam memecoins. He made this comment in response to a recent security incident involving hundreds of Bitcoin owners who lost money due to a Coldcard hardware wallet exploit.

The Coldcard wallet, considered one of the safest options for self-custody, was compromised when attackers exploited a vulnerability in its seed generation process. This allowed them to reconstruct private keys and deplete funds from vulnerable firmware versions that used predictable inputs rather than high-quality hardware entropy.

A total of 594 BTC, currently valued at approximately $50 million, was stolen from about 500 wallets. These wallets had been untouched for years before being abruptly depleted in a brief amount of time. Most of the stolen Bitcoin was combined into a single address, indicating a coordinated operation.