CVE-2022-43390 Command injection in NR7101 firmware

Medium 5.4 Published 11 Jan 2023 Updated 8 Apr 2025

An authenticated attacker can execute arbitrary OS commands on Zyxel NR7101 devices via a crafted HTTP request to the CGI program.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2022-43390?

CVE-2022-43390 is a medium-severity command injection vulnerability in Zyxel NR7101 firmware, published on 11 Jan 2023. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A command injection vulnerability in the CGI program of Zyxel NR7101 firmware prior to V1.15(ACCC.3)C0, which could allow an authenticated attacker to execute some OS commands on a vulnerable device by sending a crafted HTTP request.

Weakness: CWE-78

Which versions are affected by CVE-2022-43390?

It affects 39 products.

Products include Zyxel Ax7501-B0 Firmware, Zyxel Dx3301-T0 Firmware, Zyxel Dx4510-B1 Firmware, Zyxel Dx5401-B0 Firmware, Zyxel Emg3525-T50b Firmware, Zyxel Emg5523-T50b Firmware and 33 more.

How do I fix CVE-2022-43390?

No fix has been published for CVE-2022-43390 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2022-43390 being exploited?

There is no known exploitation of CVE-2022-43390 in the wild and no public exploit code.

Sources

Also known as GHSA-w46r-wg59-pm75.