Coldcard vulnerability drives weekly increase of over 330000 new Bitcoin addresses, resulting in user losses of 1816 BTC

According to The Block, the number of new Bitcoin addresses climbed from around 260000 to over 330000 last week due to wallet migration caused by the Coldcard vulnerability. Since July 30th, Coinkite hardware wallet users have lost at least 1816 BTC, or approximately $116 million, in four waves of attacks. This vulnerability originates from a firmware flaw in 2021, where a software random number generator with weaker security was used to generate mnemonic words instead of the device's built-in hardware entropy source, allowing attackers to brute force the wallet generated offline. Coinkite has recommended that users who generate wallets between March 2021 and the release of security patches migrate to the new wallet.