high
8.1
CWE
20
Advisory Published
Updated

CVE-2023-22916: Input Validation

First published: Mon Apr 24 2023(Updated: )

The configuration parser of Zyxel ATP series firmware versions 5.10 through 5.35, USG FLEX series firmware versions 5.00 through 5.35, USG FLEX 50(W) firmware versions 5.10 through 5.35, USG20(W)-VPN firmware versions 5.10 through 5.35, and VPN series firmware versions 5.00 through 5.35, which fails to properly sanitize user input. A remote unauthenticated attacker could leverage the vulnerability to modify device configuration data, resulting in DoS conditions on an affected device if the attacker could trick an authorized administrator to switch the management mode to the cloud mode.

Credit: security@zyxel.com.tw

Affected SoftwareAffected VersionHow to fix
Zyxel USG Flex 100 firmware>=5.00<=5.35
Zyxel USG Flex 100 firmware
Zyxel USG FLEX 100w firmware>=5.00<=5.35
Zyxel USG FLEX 100w firmware
Zyxel USG Flex 200HP Firmware>=5.00<=5.35
Zyxel USG FLEX 200 firmware
Zyxel USG FLEX 50(W) series firmware>=5.00<=5.35
Zyxel USG FLEX 50w
Zyxel USG FLEX 50w>=5.10<=5.35
Zyxel USG FLEX 50(W) series firmware
Zyxel USG FLEX 500>=5.00<=5.35
Zyxel USG FLEX 500 firmware
Zyxel USG FLEX firmware>=5.00<=5.35
Zyxel USG FLEX 700 firmware
Zyxel VPN100>=5.00<=5.35
Zyxel Zywall VPN100
Zyxel VPN1000 Firmware>=5.00<=5.35
Zyxel VPN1000 Firmware
Zyxel Zywall VPN 300 Firmware>=5.00<=5.35
Zyxel Zywall VPN300
Zyxel Zywall VPN 50 Firmware>=5.00<=5.35
Zyxel VPN50 Firmware
Zyxel USG20W-VPN Firmware>=5.10<=5.35
Zyxel USG20
Zyxel ZyWall ATP100 Firmware>=5.10<=5.35
Zyxel ATP100 Firmware
Zyxel ATP100W Firmware>=5.10<=5.35
Zyxel ATP100W Firmware
Zyxel ATP200 firmware>=5.10<=5.35
Zyxel Zywall ATP200
Zyxel ATP500 Firmware>=5.10<=5.35
Zyxel ATP500 Firmware
Zyxel Zywall ATP700>=5.10<=5.35
Zyxel ATP700 Firmware
Zyxel Zywall ATP800 Firmware>=5.10<=5.35
Zyxel ATP series firmware

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2023-22916?

    The severity of CVE-2023-22916 is high.

  • Which Zyxel devices are affected by CVE-2023-22916?

    Zyxel ATP series firmware versions 5.10 through 5.35, USG FLEX series firmware versions 5.00 through 5.35, USG FLEX 50(W) firmware versions 5.10 through 5.35, USG20(W)-VPN firmware versions 5.10 through 5.35, and VPN series firmware versions 5.00 through 5.35 are affected by CVE-2023-22916.

  • How can I fix CVE-2023-22916?

    To fix CVE-2023-22916, it is recommended to update the firmware of the affected Zyxel devices to versions higher than 5.35.

  • What is the Common Weakness Enumeration (CWE) ID for CVE-2023-22916?

    The Common Weakness Enumeration (CWE) ID for CVE-2023-22916 is 20.

  • Where can I find more information about CVE-2023-22916?

    You can find more information about CVE-2023-22916 at the following link: [https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps](https://www.zyxel.com/global/en/support/security-advisories/zyxel-security-advisory-for-multiple-vulnerabilities-of-firewalls-and-aps)

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