CVE-2026-18588: Wavlink Wl-NU516U1

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

A vulnerability has been found in Wavlink WL-NU516U1 708c073-mt7628. This affects the function fgets of the file nas.cgi. The manipulation of the argument CONTENT_LENGTH leads to stack-based buffer overflow. Remote exploitation of the attack is possible. You should upgrade the affected component. 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.