XKEYCHAINX LABS
Trezor / Public disclosure

Trezor One and Model T: physical seed extraction

Kraken reported extraction of PIN-encrypted seed material through a microcontroller fault on Trezor One and Model T. Physical access is a prerequisite.

Source date: 31 JAN 2020Reviewed: 11 October 2026

Affected scope

Trezor One / Model T · Legacy models

What the attack requires

Physical access to a legacy Trezor One or Model T.

Response & remediation

What changed

Passphrase mitigation; hardware limit

What this finding establishes

Trezor describes a strong passphrase as mitigation for the associated wallet because that passphrase is not stored on the device. This historical finding should not be generalized to Trezor’s Safe series or confused with a remote attack.