What’s Vulnerable › Vulnerabilities

CVE-2026-3704: Wavlink NU516U1 Incomplete Fix CVE-2025-10959 firewall.cgi sub_405B2C command injection

• Severity: high (CVSS 7.2 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 5.1% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-03-08 · updated 2026-06-17
• Weakness: CWE-74

Description

A vulnerability has been found in Wavlink NU516U1 251208. This vulnerability affects the function sub_405B2C of the file /cgi-bin/firewall.cgi of the component Incomplete Fix CVE-2025-10959. The manipulation leads to command injection. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. It is recommended to 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 NU516U1: 251208

References

• https://dl.wavlink.com/firmware/RD/WINSTAR_NU516U1-WO-A-2026-02-27-2fcf6ae-mt7628-squashfs-sysupgrade.bin
• https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/wavlink_DMZ.md
• https://github.com/Wlz1112/Wavlink-NU516U1-V251208-/blob/main/wavlink_DMZ.md#exp
• https://vuldb.com/?ctiid.349650
• https://vuldb.com/?id.349650
• https://vuldb.com/?submit.759233

Get alerted when CVE-2026-3704 or the next vulnerability affects your stack