CVE-2026-0641 TOTOLINK WA300 cstecgi.cgi sub_401510 command injection

Medium 5.3 Published 6 Jan 2026 Updated 23 Feb 2026

Remote attackers can execute arbitrary commands on TOTOLINK WA300 devices via the UPLOAD_FILENAME argument 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-2026-0641?

CVE-2026-0641 is a medium-severity command injection vulnerability in TOTOLINK WA300, published on 6 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 WA300 5.2cu.7112_B20190227. This vulnerability affects the function sub_401510 of the file cstecgi.cgi. The manipulation of the argument UPLOAD_FILENAME leads to command injection. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used.

Weakness: CWE-77, CWE-74

Which versions are affected by CVE-2026-0641?

It affects 1 product.

Products include Totolink Wa300 Firmware.

How do I fix CVE-2026-0641?

No fix has been published for CVE-2026-0641 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-2026-0641 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-0641 exists.

Sources

Also known as GHSA-cg2m-256m-59rq.