# CVE-2026-65058

## Summary

- **CVE ID:** CVE-2026-65058
- **Severity:** MEDIUM
- **CVSS Score:** 5.9 (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)
- **CWE:** CWE-358
- **Published:** Jul 21, 2026
- **Last Modified:** Jul 30, 2026

## 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.

## Affected Products

- Trezor — Safe 3 (0)
- Trezor — Safe 3 (70c9b0c)
- Trezor — Safe 7 (0)
- Trezor — Safe 7 (70c9b0c)
- Trezor — Safe 5 (0)
- Trezor — Safe 5 (70c9b0c)

## References

- [CNA](https://github.com/trezor/trezor-firmware/commit/70c9b0c07748)
- [CNA](https://www.cve.org/CVERecord?id=CVE-2026-65058)
- [CNA](https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/IT/white/2026/va-26-202-02.json)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.40%
- **EPSS Percentile:** 33.3

---
_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._