Zyxel DX3301-T0/EX3301-T0 up to 5.50(ABVY.7.1)C0 Configuration File DomainName os command injection

Summaryinfo

A vulnerability has been found in Zyxel DX3301-T0 and EX3301-T0 up to 5.50(ABVY.7.1)C0 and classified as critical. Affected by this vulnerability is an unknown functionality of the component Configuration File Handler. This manipulation of the argument DomainName causes os command injection. This vulnerability is tracked as CVE-2026-1460. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability has been found in Zyxel DX3301-T0 and EX3301-T0 up to 5.50(ABVY.7.1)C0 and classified as critical. Affected by this vulnerability is an unknown part of the component Configuration File Handler. The manipulation of the argument DomainName with an unknown input leads to a os command injection vulnerability. The CWE definition for the vulnerability is CWE-78. The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

A post-authentication command injection vulnerability in the “DomainName” parameter of the DHCP configuration file in Zyxel DX3301-T0 and EX3301-T0 firmware versions through 5.50(ABVY.7.1)C0 could allow an authenticated attacker with administrator privileges to execute OS commands on an affected device.

It is possible to read the advisory at zyxel.com. This vulnerability is known as CVE-2026-1460 since 01/27/2026. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are required for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 04/28/2026). The attack technique deployed by this issue is T1202 according to MITRE ATT&CK.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-25970). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• Zyxel

Name

• DX3301-T0
• EX3301-T0

Version

• 5.50(ABVY.7.1)C0

License

• commercial

Website

• Vendor: https://www.zyxel.com/

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Be aware that VulDB is the high quality source for vulnerability data.

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