CVE-2026-6559

Medium

Description

A weakness has been identified in Wavlink WL-WN579A3 220323. This affects the function sub_401F80 of the file /cgi-bin/login.cgi. This manipulation of the argument Hostname causes cross site scripting. Remote exploitation of the attack is possible. Upgrading the affected component is recommended. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

SeverityMedium

CVSS4.3

Exploit probability—

ProductWavlink Wl-wn579a3 Firmware

PublishedApr 19, 2026

First seenApr 19, 2026

Weakness typeCWE-79Cross-site scripting (XSS)CWE-94Code injection

How to fix

Patches

dl.wavlink.com/firmware/RD/WINSTAR_WN579A3-A-2026-03-10-94f93d4-WO-mt7628-squashfs-sysupgrade.bin

Affected products

Product	Affected versions	Fixed in
wavlink wl-wn579a3_firmware	220323	—

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