CVE-2026-1328 Totolink NR1800X POST Request cstecgi.cgi setWizardCfg buffer overflow

High 8.7 Published 22 Jan 2026 Updated 23 Feb 2026

Remote attackers can trigger a buffer overflow in the router's wizard configuration handler, potentially leading to code execution or privilege escalation.

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-2026-1328?

CVE-2026-1328 is a high-severity memory corruption 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 vulnerability was detected in Totolink NR1800X 9.1.0u.6279_B20210910. Impacted is the function setWizardCfg of the file /cgi-bin/cstecgi.cgi of the component POST Request Handler. Performing a manipulation of the argument ssid results in buffer overflow. The attack may be initiated remotely. The exploit is now public and may be used.

Weakness: CWE-120, CWE-119

Which versions are affected by CVE-2026-1328?

It affects 1 product.

Products include Totolink Nr1800x Firmware.

How do I fix CVE-2026-1328?

No fix has been published for CVE-2026-1328 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2026-1328 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1328 exists.

Sources

Also known as GHSA-m9xx-p5qf-6jvp.