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
- Wavlink Wl-nu516u1 — versions 240425
Weakness classification (CWE)
References
- VDB-351073 | Wavlink WL-NU516U1 login.cgi sub_404F68 cross site scripting (technical-description, vdb-entry)
- VDB-351073 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, permissions-required)
- Submit #769652 | Wavlink WL-NU516U1 V240425 Cross Site Scripting (third-party-advisory)
- Submit #769653 | Wavlink WL-NU516U1 V240425 Cross Site Scripting (Duplicate) (third-party-advisory)
- cna@vuldb.com (related)
- cna@vuldb.com (exploit)
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.