COLDCARD

SECURITY ADVISORY ⚠️
The best #bitcoin hardware wallet 🙌 Ultra-secure.The only dedicated air-gapped. Backup on SEEDPLATE from @Coinkite

[COLDCARD @COLDCARDwallet]

🚨URGENT COLDCARD SECURITY UPDATE

Read carefully before acting.

👉Mk3 seed generated on 4.0.1+ without ≥50 private, independent dice rolls: begin a careful migration now.

👉Mk4/Mk5 <5.6.0 or Q <1.5.0Q: update first, generate a new seed, then migrate.

https://t.co/HshUxevCl3

[COLDCARD @COLDCARDwallet]

The first post was the advisory and what users should do.

This second post has the technical details: what actually went wrong, why our reviews missed it, the impact across Mk3/Mk4/Q/Mk5, and what we changed.

https://t.co/HshUxevCl3

( current evaluating Mk3 firmware release )

[COLDCARD @COLDCARDwallet]

@bjmcculloch126 Your seed should not be affected, please read our post on https://t.co/HyU3goXypN

[COLDCARD @COLDCARDwallet]

🚨URGENT COLDCARD SECURITY UPDATE

Read carefully before acting.

👉Mk3 seed generated on 4.0.1+ without ≥50 private, independent dice rolls: begin a careful migration now.

👉Mk4/Mk5 <5.6.0 or Q <1.5.0Q: update first, generate a new seed, then migrate.

https://t.co/HshUxevCl3

[COLDCARD @COLDCARDwallet]

The first post was the advisory and what users should do.

This second post has the technical details: what actually went wrong, why our reviews missed it, the impact across Mk3/Mk4/Q/Mk5, and what we changed.

https://t.co/HshUxevCl3

( current evaluating Mk3 firmware release )

[COLDCARD @COLDCARDwallet]

@Jiwon111111111 @BAcct8 @HodlDee

[COLDCARD @COLDCARDwallet]

It’s been challenging, but we have now emailed every address we could reach through our store and newsletter systems.

The emails have been going out in batches since Friday. If you received one, we want to confirm that it is legitimately from Coinkite.

[COLDCARD @COLDCARDwallet]

@GabeBTCAdvisors

[COLDCARD @COLDCARDwallet]

@Jiwon111111111 @BAcct8 @HodlDee That is not correct.

[COLDCARD @COLDCARDwallet]

@BAcct8 @HodlDee This is the policy

[COLDCARD @COLDCARDwallet]

@BitBuyer313

[COLDCARD @COLDCARDwallet]

@HereforBTC @Coinkite @nvk https://t.co/D9Xv4PJ4py

[COLDCARD @COLDCARDwallet]

It’s been challenging, but we have now emailed every address we could reach through our store and newsletter systems.

The emails have been going out in batches since Friday. If you received one, we want to confirm that it is legitimately from Coinkite.

[COLDCARD @COLDCARDwallet]

@MaCapital8 We are not able to determine that from the email list, please read our official message https://t.co/np7sK7eLFC

[COLDCARD @COLDCARDwallet]

@orangepiller All official information can be found here https://t.co/np7sK7eLFC

[COLDCARD @COLDCARDwallet]

Please treat this as urgent. Follow the advisory for your model, upgrade your device, generate a new seed, and carefully move your funds.

Help spread the word, especially to people who are less online and may not see this update.

[COLDCARD @COLDCARDwallet]

@glxyresearch 🛑 Please continue to monitor https://t.co/HyU3goXypN for all official updates

[COLDCARD @COLDCARDwallet]

@BitcoinMagazine @glxyresearch 🛑 Please continue to monitor https://t.co/HyU3goXypN for all official updates

[COLDCARD @COLDCARDwallet]

Please treat this as urgent. Follow the advisory for your model, upgrade your device, generate a new seed, and carefully move your funds.

Help spread the word, especially to people who are less online and may not see this update.

[COLDCARD @COLDCARDwallet]

🚨URGENT COLDCARD SECURITY UPDATE

Read carefully before acting.

👉Mk3 seed generated on 4.0.1+ without ≥50 private, independent dice rolls: begin a careful migration now.

👉Mk4/Mk5 <5.6.0 or Q <1.5.0Q: update first, generate a new seed, then migrate.

https://t.co/HshUxevCl3

[COLDCARD @COLDCARDwallet]

🚨URGENT COLDCARD SECURITY UPDATE

Read carefully before acting.

👉Mk3 seed generated on 4.0.1+ without ≥50 private, independent dice rolls: begin a careful migration now.

👉Mk4/Mk5 <5.6.0 or Q <1.5.0Q: update first, generate a new seed, then migrate.

https://t.co/HshUxevCl3

[COLDCARD @COLDCARDwallet]

🚨 COLDCARD SECURITY UPDATE [Jul 31, 9:40 EDT]

Mk3 4.2.0 is now available.

Affected seeds without ≥50 fair, independent, private dice rolls:
👉 Mk3 4.0.1–4.1.9
👉 Mk4/Mk5 <5.6.0
👉 Q <1.5.0Q

Update first. Generate a new seed. Migrate carefully.

https://t.co/HshUxevCl3

[COLDCARD @COLDCARDwallet]

COLDCARD EDGE UPDATE

Edge hotfixes are now public:
• Mk4/Mk5: 6.6.0X
• Q: 6.6.0QX

Seed generated on older Edge firmware without ≥50 private, independent dice rolls? Update first, create a new seed, then migrate. Updating alone does not repair it.

https://t.co/HshUxevCl3

[COLDCARD @COLDCARDwallet]

COLDCARD EDGE UPDATE

Edge hotfixes are now public:
• Mk4/Mk5: 6.6.0X
• Q: 6.6.0QX

Seed generated on older Edge firmware without ≥50 private, independent dice rolls? Update first, create a new seed, then migrate. Updating alone does not repair it.

https://t.co/HshUxevCl3

[COLDCARD @COLDCARDwallet]

🚨 COLDCARD SECURITY UPDATE [Jul 31, 9:40 EDT]

Mk3 4.2.0 is now available.

Affected seeds without ≥50 fair, independent, private dice rolls:
👉 Mk3 4.0.1–4.1.9
👉 Mk4/Mk5 <5.6.0
👉 Q <1.5.0Q

Update first. Generate a new seed. Migrate carefully.

https://t.co/HshUxevCl3

[COLDCARD @COLDCARDwallet]

🚨URGENT COLDCARD SECURITY UPDATE

Read carefully before acting.

👉Mk3 seed generated on 4.0.1+ without ≥50 private, independent dice rolls: begin a careful migration now.

👉Mk4/Mk5 <5.6.0 or Q <1.5.0Q: update first, generate a new seed, then migrate.

https://t.co/HshUxevCl3

[nvk @nvk]

https://t.co/N60cz5Yprl