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    CVE-2025-15645

    Ledger Nano X, Flex, and Stax devices contain a denial of service vulnerability in the MCU firmware update process due to missing validation of the reset_handler parameter during firmware flashing. An attacker can provide a crafted reset_handler address pointing to invalid memory or attacker-controlled code to cause the device to enter an unrecoverable fault state during boot, resulting in permanent loss of operability.

    Published:May 19, 2026
    Last Modified:Jul 14, 2026
    EPS:May 19, 2026
    EPSS Score:0.0021
    CVSS Score:4.6

    Affected Products

    Vendor
    Ledger
    Product
    Flex
    Vendor
    Ledger
    Product
    Nano X
    Vendor
    Ledger
    Product
    Stax
    Vendor
    Ledger-cli
    Product
    Ledger

    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