BitBox02: Firmware 9.26.5 Closes Three Security Vulnerabilities. What to Check Now

If you own a BitBox02, you need exactly one number for this article: 9.26.5. That is the firmware version the Swiss manufacturer released on August 17, 2026 under the name Dixence, and it closes three security vulnerabilities in the device. BitBox itself writes that there are no reports of stolen user funds and that existing seeds are not affected. Your recovery phrase therefore remains valid and your coins do not have to move anywhere. What you do have to do is update, and before that run a quick check on which of the three vulnerabilities affects your device at all.

This article goes through the three weaknesses one by one, explains which models and firmware levels come into question in each case, and shows the update path that does not run through a counterfeit app. At the end comes what you expressly do not have to do. The most common mistake after a security notice is the hasty reaction rather than the vulnerability itself.

What BitBox fixed with the Dixence firmware update 9.26.5

Dixence is a firmware update for the BitBox02 and BitBox02 Nova hardware wallets. Firmware means the software that sits permanently in the device and does the actual work: generating keys, signing transactions, driving the screen. It is to be distinguished from the BitBoxApp on your computer, which only provides the user interface.

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