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    CVE-2025-63680

    Nero BackItUp in the Nero Productline is vulnerable to a path parsing/UI rendering flaw (CWE-22) that, in combination with Windows ShellExecuteW fallback extension resolution, leads to arbitrary code execution when a user clicks a crafted entry. By creating a trailing-dot folder and placing a same-basename script, Nero BackItUp renders the file as a folder icon and then invokes ShellExecuteW, which executes the script via PATHEXT fallback (.COM/.EXE/.BAT/.CMD). The issue affects recent Nero BackItUp product lines (2019-2025 and earlier) and has been acknowledged by the vendor.

    Published:Nov 14, 2025
    Last Modified:Jan 12, 2026
    EPS:Nov 14, 2025
    EPSS Score:0.00007
    CVSS Score:8.6

    Affected Products

    Vendor
    Microsoft
    Product
    Windows
    Vendor
    Nero
    Product
    Backitup

    Exploits

    https://github.com/PotatoHamm/Nero-Productline-Vulnerability

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    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