Over 1,000 BTC (around US$70 million) to a flaw in older Coldcard firmware. According to the reports, the issue wasn't caused by phishing, malware, or users exposing their seed phrases. Instead, it involved a firmware bug that could result in predictable seed generation on certain devices, making it possible for an attacker to reconstruct affected private keys offline.
Coldcard has long been regarded as one of the best Bitcoin hardware wallets, and incidents like this are rare. However, this shows that even highly respected devices can have software bugs, making it important to stay informed and apply security updates promptly.
Coldcard has long been regarded as one of the best Bitcoin hardware wallets, and incidents like this are rare. However, this shows that even highly respected devices can have software bugs, making it important to stay informed and apply security updates promptly.