Hackers are in the midst of a massive theft of cryptocurrency from supposedly secure offline hardware wallets, according to blockchain security firms monitoring the heists. At least a dozen different hackers are said to be targeting Bitcoin owners who use the hardware crypto wallet Coldcard, made by Coinkite. At this point, it’s unclear who is behind the digital robberies, and it appears like there’s more than one group of hackers, according to Galaxy Research. All because the hardware that created the seed phrase originally had one line in their code from 2021 that had a vulnerability,” wrote Goodman. In an advisory published on Thursday and updated on Saturday, Coinkite alerted users of the flaw, urged them to update their devices, and then “migrate” to a new seed phrase.