Coldcard urges users to move bitcoin as active wallet exploit continues

TechColdcard urges users to move bitcoin as active wallet exploit continuesThe maker confirmed the flaw behind roughly $114 million in losses remains live, with specific models and firmware still exposed.By Shaurya Malwa Aug 4, 2026, 12:00 p.m. 2 min readMake preferred on ShareShare this articleCopy linkX iconX (Twitter)LinkedInFacebookEmailMake preferred on SummaryShowDevelopers of the Coldcard bitcoin wallet are urging affected users to urgently move their funds as an ongoing exploit has drained as much as $114 million from self-custodied wallets.The vulnerability affects certain Mk3 devices set up on firmware 4.0.1 or later and Mk4, Mk5 and Q devices on older firmware, while wallets created using the dice-roll option are considered safe.The flaw, dormant in firmware since 2021, allows attackers to guess poorly randomized seed keys and drain funds, even as bitcoin’s price has remained near $63,800 despite the warning.Developers behind the Coldcard wallet are telling users to urgently move their bitcoin, confirming Tuesday that the exploit — which has drained as much as $114 million from self-custodied wallets — is still ongoing."Please treat this as urgent. Migrate your funds," the company wrote, adding that the threat is active and asking users to warn holders who are "less online" and may not have seen the alert. Those are the wallets most exposed, since the fix has to be done by hand.Please treat this as urgent. Migrate your funds. Follow the advisory for your model, upgrade your device, generate a new seed, and carefully move your funds.Help spread the word, especially to people who are less online and may not see this update.The threat is still ongoing. https://t.co/cbJxJles8x— COLDCARD (@COLDCARDwallet) August 4, 2026 The warning is not precautionary. CoinDesk reported Monday that a possible fourth wave of sweeps ran through the day, taking roughly 449 BTC from 709 addresses on Galaxy Research's revised count and lifting cumulative losses from about $89 m…

Coldcard urges users to move bitcoin as active wallet exploit continues

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