Galaxy's Head of Research: Coldcard May Be Facing Its Fourth Wave of Organized Attacks
2026.08.03 09:18:09
Galaxy Research Head Alex Thorn tweeted a warning that a suspected fourth wave of organized attacks targeting Coldcard hardware wallet users is underway. Over the past roughly 2.5 hours (blocks 960778–960792), 218 transactions have been recorded, involving 462 victim addresses and approximately 388.93 BTC. These transactions closely match the UTXO pattern of previous Coldcard vulnerabilities, with their frequency around 45 times higher than normal levels. Some funds have been transferred to second-hop addresses, while other transactions remain in the mempool waiting for confirmation with Replace-By-Fee (RBF) enabled. He advised affected users to move their funds out of Coldcard devices as soon as possible and use high transaction fees.
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