Service or product profile
COLDCARD Mk5: Bitcoin hardware wallet and official sources
Only with fixed firmware and a newly, securely generated seed; an older seed may remain at risk after an update.
Editorially reviewed on 20 August 2026
Key information
COLDCARD Mk5
- Service type
- Bitcoin hardware wallet
- Manufacturer
- Coinkite Inc.
- Edition
- Bitcoin-only
- Especially suitable for
- Compact air-gap
- A strong point
- Two secure elements, Bitcoin-only firmware, microSD signing and advanced PIN modes.
What to watch out for
A serious seed-generation incident disclosed in July 2026; updating alone does not repair a seed created on affected firmware.
Before buying or depositing a larger amount, check the current terms, exact domain and details in the official source.
Official sources and documentation
Official sources and documentation
The links show where the information comes from. They are not an independent security audit or a guarantee of future pricing.
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