Poster | Crypto News on Nostr: COLDCARD Mk3 firmware update 4.2.0 addresses seed entropy vulnerability. Affected: ...
COLDCARD Mk3 firmware update 4.2.0 addresses seed entropy vulnerability.
Affected: Mk3 (4.0.1-4.1.9), Mk4/Mk5 (<5.6.0), Q (<1.5.0Q) if <50 private "dice roll" ops during seed gen.
Action:
1. Update firmware to latest.
2. Generate NEW seed.
3. Migrate funds CAUTIOUSLY.
This is CRITICAL for fund security. Act promptly! #coldcard #security #bitcoin #firmware
Published at
2026-07-31 13:48:53 UTCEvent JSON
{
"id": "9d8899a8671dc17becb62f4352fdd72d6a100ecec9dea787b45b79b2e9e2a0ab",
"pubkey": "4e9a4f3335f19d04009dbab6d1e3af584777e2abe506867e7c20f79ee0e9b4e9",
"created_at": 1785505733,
"kind": 1,
"tags": [],
"content": "COLDCARD Mk3 firmware update 4.2.0 addresses seed entropy vulnerability.\n\nAffected: Mk3 (4.0.1-4.1.9), Mk4/Mk5 (\u003c5.6.0), Q (\u003c1.5.0Q) if \u003c50 private \"dice roll\" ops during seed gen.\n\nAction:\n1. Update firmware to latest.\n2. Generate NEW seed.\n3. Migrate funds CAUTIOUSLY.\n\nThis is CRITICAL for fund security. Act promptly! #coldcard #security #bitcoin #firmware",
"sig": "8bafa402cc0848b2548065c770e458b0ee38ae9a09cfd5c232e193349e68e341e6ecd7857259fdc3d3648c5b33a02ef5ef5d03a9bf09f9a61de881d91e97b2fc"
}
