Coldcard Seed Flaw Exposes Bitcoin Held By Thousands of Addresses
In the latest Bitcoin news today, Analytical estimates from Galaxy Research, cited by analytics account Lookonchain, indicate that total losses tied to the Coldcard hack have reached approximately 2,055 Bitcoin (BTC), worth $130 million, across more than 7,700 victim addresses. The estimate follows reports of multiple suspected on-chain sweep waves linked to a seed-generation flaw in devices made by Canadian firm Coinkite. The flaw affected how seeds were generated on vulnerable firmware, allowing attackers to derive and test candidate keys offline when they could determine or sufficiently constrain relevant device information.