CVE-2026-1327 Totolink NR1800X POST Request cstecgi.cgi setTracerouteCfg command injection

Medium 5.3 Published 22 Jan 2026 Updated 23 Feb 2026

Remote attackers can execute arbitrary commands on Totolink NR1800X routers via a crafted POST request to the traceroute configuration handler.

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-2026-1327?

CVE-2026-1327 is a medium-severity command injection vulnerability in Totolink NR1800X, published on 22 Jan 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A security vulnerability has been detected in Totolink NR1800X 9.1.0u.6279_B20210910. This issue affects the function setTracerouteCfg of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. Such manipulation of the argument command leads to command injection. The attack can be launched remotely. The exploit has been disclosed publicly and may be used.

Weakness: CWE-77, CWE-74

Which versions are affected by CVE-2026-1327?

It affects 1 product.

Products include Totolink Nr1800x Firmware.

How do I fix CVE-2026-1327?

No fix has been published for CVE-2026-1327 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-2026-1327 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1327 exists.

Sources

Also known as GHSA-vcr6-rc5m-f5w2.