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    CVE-2021-20123

    A local file inclusion vulnerability exists in Draytek VigorConnect 1.6.0-B3 in the file download functionality of the DownloadFileServlet endpoint. An unauthenticated attacker could leverage this vulnerability to download arbitrary files from the underlying operating system with root privileges.

    Published:Oct 13, 2021
    Last Modified:Nov 3, 2025
    EPS:Oct 13, 2021
    EPSS Score:0.93989
    CVSS Score:7.5

    CISA Notification

    Description

    A local file inclusion vulnerability exists in Draytek VigorConnect 1.6.0-B3 in the file download functionality of the DownloadFileServlet endpoint. An unauthenticated attacker could leverage this vulnerability to download arbitrary files from the underlying operating system with root privileges.

    Required Action:

    Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

    Notes:

    No extra notes provided.

    Due Date
    Sep 24, 2024
    717 days ago
    Alert Date
    Sep 3, 2024
    738 days ago

    Affected Products

    Vendor
    Draytek
    Product
    Vigorconnect

    Exploits

    https://www.tenable.com/security/research/tra-2021-42https://www.tenable.com/security/research/tra-2021-42

    Related CVEs

    CVE-2021-20129 (CVSS 7.5) — An information disclosure vulnerability exists in Draytek VigorConnect 1.6.0-B3, allowing an unauthenticated a…
    CVE-2021-20128 (CVSS 5.4) — The Profile Name field in the floor plan (Network Menu) page in Draytek VigorConnect 1.6.0-B3 was found to be …
    CVE-2021-20127 (CVSS 8.1) — An arbitrary file deletion vulnerability exists in the file delete functionality of the Html5Servlet endpoint …
    CVE-2021-20126 (CVSS 8.8) — Draytek VigorConnect 1.6.0-B3 lacks cross-site request forgery protections and does not sufficiently verify wh…
    CVE-2021-20125 (CVSS 9.8) — An arbitrary file upload and directory traversal vulnerability exists in the file upload functionality of Down…
    CVE-2021-20124 (CVSS 7.5) — A local file inclusion vulnerability exists in Draytek VigorConnect 1.6.0-B3 in the file download functionalit…

    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