CVE-2026-2527 Wavlink WL-WN579A3 login.cgi command injection

Medium 5.3 Published 16 Feb 2026 Updated 23 Feb 2026

Remote attackers can execute arbitrary commands on Wavlink WL-WN579A3 routers via the login.cgi script due to improper input validation.

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-2026-2527?

CVE-2026-2527 is a medium-severity command injection vulnerability in Wavlink WL-WN579A3, published on 16 Feb 2026. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

A vulnerability was determined in Wavlink WL-WN579A3 up to 20210219. Affected is an unknown function of the file /cgi-bin/login.cgi. Executing a manipulation of the argument key can lead to command injection. The attack may be launched remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-77, CWE-74

Which versions are affected by CVE-2026-2527?

It affects 1 product.

Products include Wavlink Wl-Wn579a3 Firmware.

How do I fix CVE-2026-2527?

No fix has been published for CVE-2026-2527 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-2026-2527 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2527 exists.

Sources

Also known as GHSA-wrqv-g27w-82rr.