CVE-2026-3716 Wavlink WL-WN579X3-C adm.cgi sub_401AD4 cross site scripting

Medium 4.8 Published 8 Mar 2026 Updated 11 Mar 2026

Remote attackers can inject malicious scripts via the Hostname argument in the admin interface, potentially compromising user sessions.

Exploited in the wild: Not known
Login needed: An administrator
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-3716?

CVE-2026-3716 is a medium-severity cross-site scripting vulnerability in Wavlink WL-WN579X3-C, published on 8 Mar 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

Official description

A vulnerability was determined in Wavlink WL-WN579X3-C 231124. This vulnerability affects the function sub_401AD4 of the file /cgi-bin/adm.cgi. Executing a manipulation of the argument Hostname can lead to cross site scripting. It is possible to launch the attack remotely. The exploit has been publicly disclosed and may be utilized. Upgrading to version 20260226 is able to resolve this issue. The affected component should be upgraded. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Weakness: CWE-94, CWE-79

Which versions are affected by CVE-2026-3716?

It affects 1 product.

Products include Wavlink Wl-Wn579x3-C Firmware.

How do I fix CVE-2026-3716?

No fix has been published for CVE-2026-3716 yet. Limit exposure of the affected software until one is available.

Escape output for the context it lands in and set a strict Content Security Policy. Upgrading the affected component is the real fix. More about Cross-site scripting.

Is CVE-2026-3716 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-3716 exists.

Sources

Also known as GHSA-hf5c-9m3r-mqv2.