CVE-2026-2120 D-Link DIR-823X Configuration Parameter set_server_settings os command injection

High 8.6 Published 8 Feb 2026 Updated 23 Feb 2026

Remote attackers can execute arbitrary OS commands on D-Link DIR-823X routers via the set_server_settings endpoint.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2026-2120?

CVE-2026-2120 is a high-severity command injection vulnerability in D-Link DIR-823X, published on 8 Feb 2026. An attacker needs administrator access to exploit it, with no action from the victim.

Official description

A vulnerability was identified in D-Link DIR-823X 250416. This affects an unknown function of the file /goform/set_server_settings of the component Configuration Parameter Handler. The manipulation of the argument terminal_addr/server_ip/server_port leads to os command injection. The attack may be initiated remotely. The exploit is publicly available and might be used.

Weakness: CWE-78, CWE-77

Which versions are affected by CVE-2026-2120?

It affects 1 product.

Products include Dlink Dir-823x Firmware.

How do I fix CVE-2026-2120?

No fix has been published for CVE-2026-2120 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-2026-2120 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2120 exists.

Sources

Also known as GHSA-jrmw-6fvh-x39j.