RCE in Wavlink Wl-nu516u1

CVE-2026-4166

A vulnerability was found in Wavlink WL-NU516U1 240425. The impacted element is the function sub_404F68 of the file /cgi-bin/login.cgi. The manipulation of the argument homepage/hostname results in cross site scripting. The attack can be l…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.000 (14.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:L/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-4166?
CVE-2026-4166 is a low-severity vulnerability in Wavlink Wl-nu516u1, classified under Cross-site Scripting. CVSS score: 3.5/10. Published 2026-03-16.
How severe is CVE-2026-4166?
Low severity. CVSS v3 base score is 3.5 out of 10.