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    CVE-2026-65058

    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.

    Published:Jul 21, 2026
    Last Modified:Jul 30, 2026
    EPS:Jul 21, 2026
    EPSS Score:0.00279
    CVSS Score:5.3

    Affected Products

    Vendor
    Trezor
    Product
    Safe 3
    Vendor
    Trezor
    Product
    Safe 5
    Vendor
    Trezor
    Product
    Safe 7

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High