COLDCARD
It seems clear that ColdCard Mk3 hardware wallets with firmware version 4.0.1 and ALL later firmware versions of the Mk3 are compromised.
It is advisable to CALMLY and CAREFULLY move your bitcoin to another wallet address that was NOT generated by a Mk3.
If you have a Mk3 with and earlier firmware version it is still advisable to move your funds to a fresh wallet generated by dice rolls etc.
Read the update from COLDCARD here -> https://blog.coinkite.com/coldcard-mk3-seed-generation-warning/
Nunyabidness / Nunya Bidness
npub1vw…qzugd
2026-07-31 00:06:40 UTC
Author Public Key
npub1vwymuey3u7mf860ndrkw3r7dz30s0srg6tqmhtjzg7umtm6rn5eq2qzugdSeen on
wss://nostr.winePublished at
2026-07-31 00:06:40 UTCEvent JSON
{
"id": "3d89d74757c4809bdcc89b56050e35ab90cb0c4314858ab0ff2329c87aa246dc",
"pubkey": "6389be6491e7b693e9f368ece88fcd145f07c068d2c1bbae4247b9b5ef439d32",
"created_at": 1785456400,
"kind": 1,
"tags": [
[
"client",
"Ditto",
"31990:781a1527055f74c1f70230f10384609b34548f8ab6a0a6caa74025827f9fdae5:ditto"
]
],
"content": "COLDCARD\n\nIt seems clear that ColdCard Mk3 hardware wallets with firmware version 4.0.1 and ALL later firmware versions of the Mk3 are compromised.\n\nIt is advisable to CALMLY and CAREFULLY move your bitcoin to another wallet address that was NOT generated by a Mk3.\n\nIf you have a Mk3 with and earlier firmware version it is still advisable to move your funds to a fresh wallet generated by dice rolls etc.\n\nRead the update from COLDCARD here -\u003e https://blog.coinkite.com/coldcard-mk3-seed-generation-warning/",
"sig": "bb3d2aa170a8485da22b0cbb9246e41eb4c5c00ecdcf452a174f146c61c1ff6654f930d17ef5a719105c06d1b07c7cb9ce1feb09c8abd4956ba827978d0a573b"
}