CVE-2026-3661: Wavlink Wl-NU516U1 Firmware

High severity, CVSS 7.2. EPSS: 11.3% chance of exploitation in the next 30 days.

A flaw has been found in Wavlink WL-NU516U1 240425. This affects the function ota_new_upgrade of the file /cgi-bin/adm.cgi. This manipulation of the argument model causes command injection. It is possible to initiate the attack remotely. The exploit has been published and may be used. The vendor was contacted early about this disclosure.

Affected products

• Wavlink Wl-NU516U1 Firmware: version m16u1_v240425 only

Published 2026-03-07. Last modified 2026-06-17.