CVE-2026-3703

Critical

Description

A flaw has been found in Wavlink NU516U1 251208. This affects the function sub_401A10 of the file /cgi-bin/login.cgi. Executing a manipulation of the argument ipaddr can lead to out-of-bounds write. The attack may be performed from remote. The exploit has been published and may be used. 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.

SeverityCritical

CVSS9.8

Exploit probability—

ProductWavlink Wl-nu516u1 Firmware

PublishedMar 8, 2026

First seenMar 8, 2026

Weakness typeCWE-787Out-of-bounds write CWE-119Memory buffer bounds error

How to fix

Patches

dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-02-27-2fcf6ae-mt7628-squashfs-sysupgrade.bin

Affected products

Product	Affected versions	Fixed in
wavlink wl-nu516u1_firmware	251208	—

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