CVE-2026-65058

Trezor Safe improper security check in on-device display

Published Jul 21, 2026 CVSS 4.0 · 5.9 Medium EPSS < 1% KEV · Not listed
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Trezor
Trezor safe 3
Trezor safe 5
Trezor safe 7
Vendors & Products Trezor
Trezor safe 3
Trezor safe 5
Trezor safe 7
Type Values Removed Values Added
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.
Title Trezor Safe improper security check in on-device display
Weaknesses CWE-358
References
Metrics cvssV3_1

{'score': 5.3, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N'}

cvssV4_0

{'score': 5.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
cisa-cg
Published
Updated
Jul 30, 2026, 5:29 PM
Reserved
Jul 21, 2026, 2:35 PM
Status
Awaiting Analysis
Published
Jul 21, 2026, 9:16 PM
Modified
Jul 30, 2026, 7:18 PM