CVE-2026-3703

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.

• CWE-119
• CWE-787

• https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-02-27-2fcf6ae-mt7628-squashfs-sysupgrade.binBroken Link
• https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/ipaddr.mdExploit, Vendor Advisory
• https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/ipaddr.md#exp-exploit--pocExploit, Vendor Advisory
• https://vuldb.com/?ctiid.349649Permissions Required, VDB Entry
• https://vuldb.com/?id.349649Third Party Advisory, VDB Entry
• https://vuldb.com/?submit.759226Third Party Advisory, VDB Entry

Published

Mar 8, 2026

Last Modified

Jun 17, 2026

Status

Analyzed

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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