Zyxel security advisory for OS command injection vulnerability of NWA1100-NH access point

Zyxel_Carter Posts: 62  Zyxel Employee
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edited March 2022 in Security Advisories

CVE: CVE-2021-4039


Zyxel has released a patch addressing an OS command injection vulnerability in the NWA1100-NH access point. Users are advised to install it for optimal protection.

What is the vulnerability?

An OS command-injection vulnerability in the NWA1100-NH access point could allow an attacker to execute arbitrary OS commands via the web interface of the vulnerable device.

What versions are vulnerable—and what should you do?

After a thorough investigation, we’ve identified only one vulnerable product and released a firmware patch to address the issue, as shown in the table below.

Affected model

Patch availability



Got a question or a tipoff?

Please contact your local service rep or comment below for further information or assistance.


Thanks to Ahmed Alroky for reporting the issue to us.

Revision history

2022-03-01: Initial release