CVE-2026-1547 Totolink A7000R cstecgi.cgi setUnloadUserData command injection

Medium 5.3 Published 28 Jan 2026 Updated 23 Feb 2026

Remote attackers can execute arbitrary commands on Totolink A7000R routers via the setUnloadUserData function in cstecgi.cgi.

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-2026-1547?

CVE-2026-1547 is a medium-severity command injection vulnerability in Totolink A7000R, published on 28 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 A7000R 4.1cu.4154. This affects the function setUnloadUserData of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument plugin_name results in command injection. It is possible to launch the attack remotely. The exploit is now public and may be used.

Weakness: CWE-77, CWE-74

Which versions are affected by CVE-2026-1547?

It affects 1 product.

Products include Totolink A7000r Firmware.

How do I fix CVE-2026-1547?

No fix has been published for CVE-2026-1547 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-2026-1547 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-1547 exists.

Sources

Also known as GHSA-26qr-hrpr-gcj8.