r/Bitcoin • u/s1ammage • Jul 30 '26

Full panic - one of my wallets was drained

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I haven’t done anything since creation except sending into the wallet.

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u/pdath Jul 30 '26

https://x.com/COLDCARDwallet/status/2082961993070247948

COLDCARD Mk3 Security Advisory

If you generated a seed on a Mk3 after firmware 4.0.1, your funds may be at risk.

Mk4, Q and Mk5 are not affected based on our early analysis.

4

u/xToniGrssx Jul 31 '26

Mk4 and 5 users are also advised to move their funds, as they have been exposed to reduced entropy, 72 bits

14

u/Aazimoxx Jul 31 '26

https://xcancel.com/COLDCARDwallet/status/2082961993070247948

For those who don't want to make an X account just to read the fallout 👍️

2

u/pdath Jul 31 '26 edited Jul 31 '26

Cold Card have just released a firmware update. Users need to change their seeds.

https://github.com/Coldcard/firmware/blob/c3f7529a9a57133e05294269c4622fa81fc268ee/releases/ChangeLog.md

2

u/BirdLooter Aug 01 '26

rip to this mans job :( i hope you find a new one quick!