CVE WatchJul 5, 2026

CVE-2025-69893

A side-channel vulnerability exists in the implementation of BIP-39 mnemonic processing, as observed in Trezor One v1.13.0 to v1.14.0, Trezo

CVSS

4.6

Medium

EPSS

0.2%

p15

KEV

—

Exploit Today

0-100

Published: Apr 14, 2026 · Last modified: Jul 5, 2026 · CWE-385

EPSS · 30d

0.2%EPSS · 30 days0.2%

2026-06-302026-07-16

Technical description

A side-channel vulnerability exists in the implementation of BIP-39 mnemonic processing, as observed in Trezor One v1.13.0 to v1.14.0, Trezor T v1.13.0 to v1.14.0, and Trezor Safe v1.13.0 to v1.14.0 hardware wallets. This originates from the BIP-39 standard guidelines, which induce non-constant time execution and specific branch patterns for word searching. An attacker with physical access during the initial setup phase can collect a single side-channel trace. By utilizing profiling-based Deep Learning Side-Channel Analysis (DL-SCA), the attacker can recover the mnemonic code and subsequently steal the assets. The issue was patched.

Official references

trezor.iohttps://trezor.io/vulnerability/fix-side-channel-in-bip-39-mnemonic-processing-when-unlocked

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