594 BTC Stolen From 500 Wallets as Coldcard Seed Flaw Investigated

NewsFri, 31 Jul 2026 12:35:42 UTC6 hours ago
594 BTC Stolen From 500 Wallets as Coldcard Seed Flaw Investigated
  • Coinkite warns Coldcard seed flaw may be linked to theft of 594 BTC from about 500 wallets.
  • Researchers say affected wallet seeds may date back to 2021 as investigation continues.
  • Additional transactions could raise the total stolen to about 1,082 BTC if confirmed.

A security warning from hardware wallet maker Coinkite coincided with the discovery of a large-scale Bitcoin theft that emptied hundreds of wallets within minutes, prompting renewed scrutiny of wallet seed generation.

Approximately 594 BTC, valued at about $38 million, was drained from around 500 single-signature wallets during a set of transactions. While blockchain researchers have linked the incident to a flaw affecting certain Coldcard wallet seeds, Coinkite has not confirmed that the vulnerability caused the theft.

The stolen funds moved through 1,324 transaction outputs spread across 500 transac…

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