Riskcovery

CVE-2026-65058

Trezor Safe improper security check in on-device display

State
Published
Severity
5.9 Medium
Published
Jul 21, 2026
Updated
Jul 30, 2026
Reserved
Jul 21, 2026

Read the record on cve.org

Description

Trezor Safe 3, Safe 5, and Safe 7 firmware contains a confirmation-binding flaw in the Ethereum sign_tx / sign_tx_eip1559 flow. For contract interactions, the device confirms only the initial calldata chunk while the signature commits to the full streamed calldata. An attacker could present calldata to a victim then supply a different tail that changes the signed transaction. Fixed in 70c9b0c.

Scores

CVSSScoreVectorSource
4.05.9 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:Ncisa-cg
3.15.3 MediumCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:Ncisa-cg

Weaknesses

  • CWE-358 Improperly Implemented Security Check for Standard

Affected Products

ProductVersions
Safe 3Trezor
  • before 70c9b0cAffected
  • 70c9b0cNot affected
Safe 7Trezor
  • before 70c9b0cAffected
  • 70c9b0cNot affected
Safe 5Trezor
  • before 70c9b0cAffected
  • 70c9b0cNot affected

References

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