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
Zyxel Usg Flex 100w Firmware>=5.00<=5.35
Zyxel Usg Flex 100w
Zyxel Usg Flex 200 Firmware>=5.00<=5.35
Zyxel Usg Flex 200
Zyxel Usg Flex 50 Firmware>=5.00<=5.35
Zyxel Usg Flex 50
Zyxel Usg Flex 50w Firmware>=5.10<=5.35
Zyxel Usg Flex 50w
Zyxel Usg Flex 500 Firmware>=5.00<=5.35
Zyxel Usg Flex 500
Zyxel Usg Flex 700 Firmware>=5.00<=5.35
Zyxel Usg Flex 700
Zyxel Vpn100 Firmware>=5.00<=5.35
Zyxel Vpn100
Zyxel Multiple Network-Attached Storage (NAS) Devices>=5.00<=5.35
Zyxel Multiple Network-Attached Storage (NAS) Devices
Zyxel Vpn300 Firmware>=5.00<=5.35
Zyxel Vpn300
Zyxel Vpn50 Firmware>=5.00<=5.35
Zyxel Vpn50
Zyxel Usg 20w-vpn Firmware>=5.10<=5.35
Zyxel Usg 20w-vpn
Zyxel Multiple Network-Attached Storage (NAS) Devices>=5.10<=5.35
Zyxel Multiple Network-Attached Storage (NAS) Devices
Zyxel Atp100w Firmware>=5.10<=5.35
Zyxel Atp100w
Zyxel Atp200 Firmware>=5.10<=5.35
Zyxel ATP200
Zyxel Atp500 Firmware>=5.10<=5.35
Zyxel Atp500
Zyxel Atp700 Firmware>=5.10<=5.35
Zyxel Atp700
Zyxel Atp800 Firmware>=5.10<=5.35
Zyxel Atp800

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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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