CVE-2026-4497 Totolink WA300 cstecgi.cgi recvUpgradeNewFw os command injection

Medium 6.9 Published 20 Mar 2026 Updated 20 Mar 2026

Remote attackers can execute arbitrary OS commands on Totolink WA300 routers via the recvUpgradeNewFw function in cstecgi.cgi.

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

What is CVE-2026-4497?

CVE-2026-4497 is a medium-severity command injection vulnerability in Totolink WA300, published on 20 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability was determined in Totolink WA300 5.2cu.7112_B20190227. Affected by this issue is the function recvUpgradeNewFw of the file /cgi-bin/cstecgi.cgi. This manipulation causes os command injection. Remote exploitation of the attack is possible. The exploit has been publicly disclosed and may be utilized.

Weakness: CWE-78, CWE-77

Which versions are affected by CVE-2026-4497?

It affects 1 product.

Products include Totolink Wa300 Firmware.

How do I fix CVE-2026-4497?

No fix has been published for CVE-2026-4497 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-2026-4497 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4497 exists.

Sources

Also known as GHSA-qwx8-2rqw-pp6q.