The Coldcard wallet hack involved a firmware bug (March 2021 build) that made some wallets generate seed phrases with weaker randomness
| kind | human |
|---|---|
| block | 965,830 — 2026-09-06 20:58 UTC |
| transaction | 2c90db3303170283188664ca5fa7d968d5aaea188d47bc3e2f1ff21f3b4cb5ec (output 0) |
| explorers | blockstream.info ↗ · mempool (emzy mirror) ↗ |
| payload size | 135 bytes |
| on chain | looking up the transaction… |
| share | post on X ↗ · permalink · card image ↗ |
| raw payload | 54686520436f6c64636172642077616c6c6574206861636b20696e766f6c7665642061206669726d776172652062756720284d617263682032303231206275696c64292074686174206d61646520736f6d652077616c6c6574732067656e6572617465207365656420706872617365732077697468207765616b65722072616e646f6d6e657373 |