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    CVE-2023-4473

    A command injection vulnerability in the web server of the Zyxel NAS326 firmware version V5.21(AAZF.14)C0 and NAS542 firmware version V5.21(ABAG.11)C0 could allow an unauthenticated attacker to execute some operating system (OS) commands by sending a crafted URL to a vulnerable device.

    Published:Nov 30, 2023
    Last Modified:Dec 16, 2025
    EPS:Nov 30, 2023
    EPSS Score:0.3292
    CVSS Score:9.8

    Affected Products

    Vendor
    Zyxel
    Product
    Nas326
    Vendor
    Zyxel
    Product
    Nas326 Firmware
    Vendor
    Zyxel
    Product
    Nas542
    Vendor
    Zyxel
    Product
    Nas542 Firmware

    Exploits

    No exploit reference

    Related CVEs

    CVE-2024-6342 (CVSS 9.8) — **UNSUPPORTED WHEN ASSIGNED** A command injection vulnerability in the export-cgi program of Zyxel NAS326 firm…
    CVE-2024-29976 (CVSS 6.5) — ** UNSUPPORTED WHEN ASSIGNED ** The improper privilege management vulnerability in the command “show_allsessio…
    CVE-2024-29975 (CVSS 6.7) — ** UNSUPPORTED WHEN ASSIGNED ** The improper privilege management vulnerability in the SUID executable binary …
    CVE-2024-29974 (CVSS 9.8) — ** UNSUPPORTED WHEN ASSIGNED ** The remote code execution vulnerability in the CGI program “file_upload-cgi” i…
    CVE-2024-29973 (CVSS 9.8) — ** UNSUPPORTED WHEN ASSIGNED ** The command injection vulnerability in the “setCookie” parameter in Zyxel NAS3…
    CVE-2024-29972 (CVSS 9.8) — ** UNSUPPORTED WHEN ASSIGNED ** The command injection vulnerability in the CGI program "remote_help-cgi" in Zy…
    CVE-2023-5372 (CVSS 7.2) — The post-authentication command injection vulnerability in Zyxel NAS326 firmware versions through V5.21(AAZF.1…
    CVE-2023-4474 (CVSS 9.8) — The improper neutralization of special elements in the WSGI server of the Zyxel NAS326 firmware version V5.21(…
    CVE-2023-37928 (CVSS 8.8) — A post-authentication command injection vulnerability in the WSGI server of the Zyxel NAS326 firmware version …
    CVE-2023-37927 (CVSS 8.8) — The improper neutralization of special elements in the CGI program of the Zyxel NAS326 firmware version V5.21(…

    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