CVE-2026-65058 | Trezor Safe 3, Safe 5, and Safe 7 firmware contains a confir… | CVSS 5.3 MEDIUM

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.

Metadata

CVE ID: CVE-2026-65058
State: PUBLISHED
Assigner: cisa-cg
Reserved: 2026-07-21 14:35 UTC
Published: 2026-07-21 20:13 UTC
Last updated: 2026-07-21 20:13 UTC
Primary CWE: CWE-358
CWE-358 Improperly Implemented Security Check for Standard
Vendor / Product: Trezor / Safe 3
Sources: cve.org · NVD

Severity & Metrics

5.3 MEDIUM CVSS 3.1

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

Affected products (3)

Vendor	Product	Platform	Versions
Trezor	Safe 3	—	0 < 70c9b0c, 70c9b0c
Trezor	Safe 5	—	0 < 70c9b0c, 70c9b0c
Trezor	Safe 7	—	0 < 70c9b0c, 70c9b0c

Weakness (CWE)

CWE	Source	Description
CWE-358	cna	CWE-358 Improperly Implemented Security Check for Standard

CVSS scores (2)

Score	Severity	Version	Source	Vector
5.9	MEDIUM	4.0	cna	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
5.3	MEDIUM	3.1	cna	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:H/A:N

References (3)