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    CVE-2026-3040

    A vulnerability was identified in DrayTek Vigor 300B up to 1.5.1.6. This affects the function cgiGetFile of the file /cgi-bin/mainfunction.cgi/uploadlangs of the component Web Management Interface. The manipulation of the argument File leads to os command injection. The attack may be initiated remotely. The exploit is publicly available and might be used. The vendor confirms that "300B is EoL, and this is an authenticated vulnerability. We don't plan to fix it." This vulnerability only affects products that are no longer supported by the maintainer.

    Published:Feb 23, 2026
    Last Modified:Apr 17, 2026
    EPS:Feb 23, 2026
    EPSS Score:0.0043
    CVSS Score:4.7

    Affected Products

    Vendor
    Draytek
    Product
    Vigor300b
    Vendor
    Draytek
    Product
    Vigor300b Firmware

    Exploits

    https://github.com/master-abc/cve/issues/42

    Related CVEs

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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