CVE-2026-18589: Wavlink Wl-NU516U1

Critical severity, CVSS 9.8. EPSS: 1.1% chance of exploitation in the next 30 days.

A vulnerability was found in Wavlink WL-NU516U1 708c073-mt7628. This impacts the function change_password of the file nas.cgi. The manipulation of the argument User1Passwd results in stack-based buffer overflow. The attack can be executed remotely. The exploit has been made public and could be used. 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.

Affected products

• Wavlink Wl-NU516U1: version 708c073-mt7628 only

Published 2026-08-03. Last modified 2026-08-12.