CVE-2026-4543 Wavlink WL-WN578W2 POST Request firewall.cgi command injection
Remote attackers can execute arbitrary commands on Wavlink WL-WN578W2 routers via a command injection vulnerability in the firewall.cgi POST 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-2026-4543?
CVE-2026-4543 is a medium-severity command injection vulnerability in Wavlink WL-WN578W2, published on 22 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
A vulnerability was found in Wavlink WL-WN578W2 221110. The impacted element is an unknown function of the file /cgi-bin/firewall.cgi of the component POST Request Handler. Performing a manipulation of the argument dmz_flag/del_flag results in command injection. It is possible to initiate the attack remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.
Which versions are affected by CVE-2026-4543?
It affects 1 product.
Products include Wavlink Wl-Wn578w2 Firmware.
How do I fix CVE-2026-4543?
No fix has been published for CVE-2026-4543 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-2026-4543 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-4543 exists.
Other vulnerabilities in Wavlink WL-WN578W2
- CVE-2025-10358 Wavlink WL-WN578W2 wireless.cgi sub_404850 os command injection
- CVE-2025-10359 Wavlink WL-WN578W2 wireless.cgi sub_404DBC os command injection
- CVE-2025-10321 Wavlink WL-WN578W2 live_online.shtml information disclosure
- CVE-2025-10322 Wavlink WL-WN578W2 sysinit.html password recovery
- CVE-2025-10323 Wavlink WL-WN578W2 wizard_rep.shtml sub_409184 command injection
Sources
Also known as GHSA-xvp7-mx9h-8g48.