CWE
78 77
Advisory Published
Updated

CVE-2023-35138: OS Command Injection

First published: Thu Nov 30 2023(Updated: )

A command injection vulnerability in the “show_zysync_server_contents” function 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 HTTP POST request.

Credit: security@zyxel.com.tw

Affected SoftwareAffected VersionHow to fix
All of
Zyxel NAS326 firmware<=5.21\(aazf.14\)c0
Zyxel NAS326
All of
Zyxel Nas542 Firmware<=5.21\(abag.11\)c0
Zyxel NAS542

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Frequently Asked Questions

  • What is CVE-2023-35138?

    CVE-2023-35138 is a command injection vulnerability in the “show_zysync_server_contents” function of the Zyxel NAS326 and NAS542 firmware.

  • What is the severity of CVE-2023-35138?

    The severity of CVE-2023-35138 is critical, with a severity value of 9.8.

  • How does CVE-2023-35138 affect Zyxel NAS326 firmware?

    CVE-2023-35138 affects Zyxel NAS326 firmware version V5.21(AAZF.14)C0, allowing an unauthenticated attacker to execute operating system commands.

  • How does CVE-2023-35138 affect Zyxel NAS542 firmware?

    CVE-2023-35138 affects Zyxel NAS542 firmware version V5.21(ABAG.11)C0, allowing an unauthenticated attacker to execute operating system commands.

  • How can I fix CVE-2023-35138?

    To fix CVE-2023-35138, update your Zyxel NAS326 and NAS542 firmware to a version that is not affected.

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