Trezor Safe improper security check in on-device display
Summary
| CVE | CVE-2026-65058 |
|---|---|
| State | PUBLISHED |
| Assigner | cisa-cg |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2026-07-21 21:16:54 UTC |
| Updated | 2026-07-21 21:16:54 UTC |
| 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. |
Risk And Classification
Primary CVSS: v4.0 5.9 MEDIUM from 9119a7d8-5eab-497f-8521-727c672e3725
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Problem Types: CWE-358 | CWE-358 CWE-358 Improperly Implemented Security Check for Standard
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | 9119a7d8-5eab-497f-8521-727c672e3725 | Secondary | 5.9 | MEDIUM | 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/E:X/C... |
| 4.0 | CNA | DECLARED | 5.9 | MEDIUM | 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 |
| 3.1 | 9119a7d8-5eab-497f-8521-727c672e3725 | Secondary | 5.3 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N |
| 3.1 | CNA | DECLARED | 5.3 | MEDIUM | CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N |
CVSS v4.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowAttack Requirements
PresentPrivileges Required
NoneUser Interaction
ActiveConfidentiality
NoneIntegrity
HighAvailability
NoneSub Conf.
NoneSub Integrity
NoneSub Availability
NoneCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
HighPrivileges Required
NoneUser Interaction
RequiredScope
UnchangedConfidentiality
NoneIntegrity
HighAvailability
NoneCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | Trezor | Safe 3 | affected 70c9b0c custom | Not specified |
| CNA | Trezor | Safe 3 | unaffected 70c9b0c | Not specified |
| CNA | Trezor | Safe 7 | affected 70c9b0c custom | Not specified |
| CNA | Trezor | Safe 7 | unaffected 70c9b0c | Not specified |
| CNA | Trezor | Safe 5 | affected 70c9b0c custom | Not specified |
| CNA | Trezor | Safe 5 | unaffected 70c9b0c | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| github.com/trezor/trezor-firmware/commit/70c9b0c07748 | 9119a7d8-5eab-497f-8521-727c672e3725 | github.com | |
| raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-202-02.json | 9119a7d8-5eab-497f-8521-727c672e3725 | raw.githubusercontent.com | |
| www.cve.org/CVERecord | 9119a7d8-5eab-497f-8521-727c672e3725 | www.cve.org | |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: Oleh Konko, 1seal (en)
There are currently no legacy QID mappings associated with this CVE.