CVE-2026-3703

Name: CVE-2026-3703
Creator: NVD / NIST
Published: 2026-03-08T05:16:29.08+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.9/10EPSS 0.82%

Last modified Jun 17, 2026

CVE-2026-3703 is a high-severity vulnerability rated 8.9/10 on the CVSS scale. A flaw has been found in Wavlink NU516U1 251208. This affects the function sub_401A10 of the file /cgi-bin/login.cgi. EPSS estimates a 0.82% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CVSS 4.0

8.9/10

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

EPSS Probability

0.82%

52.5th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Wavlink	Wl-Nu516u1 Firmware	251208

References

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

Timeline

Published: Mar 8, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-3703?

How severe is CVE-2026-3703?

CVE-2026-3703 has a CVSS score of 8.9/10 (HIGH severity). The EPSS model estimates a 0.82% probability of exploitation in the next 30 days.

How do I fix CVE-2026-3703?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-3703?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST