coldcard firmware vulnerability leads to the transfer of 1,816 BTC, resulting in a loss of approximately 116 million US dollars
2026-11-12 23:05:19
According to CoinMeta, as reported by Bitcoin News, Coinkite CEO Rodolfo Novak indicates that a AI model has discovered a vulnerability in coldcard 4.0.1 and subsequent versions of the firmware, which may allow for bypassing of the hardware random number generator. Between July 30th and August 4th, over 5,200 addresses suffered losses of approximately 1,816 BTC, amounting to around $116 million. James O had previously pointed out privately in May 2025 that there were issues with the random number generation in coldcard. A firmware update can fix the problem on new devices, but it cannot restore the old seed phrases; affected users will need to generate new ones.
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