Last week we released the firmware update 1.8.0 for Trezor One devices, and today we’re proud to release the firmware update 2.1.0 for Trezor Model T devices. Apart from various functional improvements and minor fixes, these updates address and fix three notable vulnerabilities found in recent months.

If you want to learn about the in-depth technical details of these security updates, check out the separate Dev Corner article here.

Patching security issues is always a challenging but positive experience, and we truly appreciate the knowledge brought to this conversation by everyone who worked with us. We worked with some of the best-known experts in the field of embedded hardware security demonstrating Trezor is an essential part of both the open source hardware and Bitcoin communities, and we aim to remain the innovation leaders in these two areas. Communication with all involved parties was very professional and focused on a common goal: improving the overall security of the solutions we provide to our users.

Exploiting either of these vulnerabilities requires physical access to the device. An attacker also needs a specialized hardware connected to Trezor device to perform the attack. Those who use passphrases to protect their wallets are unaffected unless they disclosed their passphrase to the perpetrator. At the time of writing this article, there is no evidence that any of these vulnerabilities have ever been exploited outside of the lab to extract any data. As always, we strongly recommend keeping all Trezor devices updated with the latest firmware to maintain the maximum level of security.

Is my Trezor safe?
The previously described vulnerabilities can only be exploited after gaining physical access to your device (and taking it apart). Both attacks are fairly sophisticated, requiring substantial know-how and experience. Some of the crucial information needed to exploit these vulnerabilities has never been published. Furthermore, if you use a strong passphrase to protect your wallet, you can’t be affected by any of them.

Is Trezor Model T affected?
There is no evidence that the Trezor Model T could have been directly affected by these vulnerabilities. Nonetheless, our developers made the appropriate updates to the Trezor T code to mitigate any possible future risks, even hypothetical ones.

How can I update my Trezor?
You will find the step-by-step instructions in our User manual. Before you start, make sure to have your recovery seed ready at hand.

Please note that if your Trezor One device is currently running firmware version 1.6.1 (bootloader version 1.4.0), your device memory will be wiped after this update. Please make sure you have the correct recovery seed with you, as you will need to recover your Trezor device from seed backup. You can test your recovery seed before you update the device firmware.

Created by SatoshiLabs in 2014, the Trezor One is the original and most trusted hardware wallet in the world. It offers unmatched security for cryptocurrencies, password management, and serves as the second factor in Two-Factor Authentication. These features combine with an interface that is easy to use whether you are a security expert or a brand new user.

Trezor Model T is the next-generation hardware wallet, designed with the benefits of the original Trezor in mind, combined with a modern and intuitive interface for improved user experience and security. It features a touchscreen, faster processor, and advanced coin support, as well as all the features of the Trezor One.

Firmware updates for Trezor One (firmware 1.8.0) and Trezor Model T (firmware 2.1.0) was originally published in Trezor Blog on Medium, where people are continuing the conversation by highlighting and responding to this story.

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