RCE in Wavlink Wl-nu516u1
CVE-2026-3661
A flaw has been found in Wavlink WL-NU516U1 240425. This affects the function ota_new_upgrade of the file /cgi-bin/adm.cgi. This manipulation of the argument model causes command injection. It is possible to initiate the attack remotely. T…
EPSS: 0.002 (47.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Wavlink Wl-nu516u1 — versions 240425
- Wavlink Wl-nu516u1_firmware — versions m16u1_v240425
Weakness classification (CWE)
References
- VDB-349550 | Wavlink WL-NU516U1 adm.cgi ota_new_upgrade command injection (technical-description, Third Party Advisory, VDB Entry, vdb-entry)
- VDB-349550 | CTI Indicators (IOB, IOC, TTP, IOA) (signature, Permissions Required, permissions-required, VDB Entry)
- Submit #758227 | wavlink WL-NU516U1-A M16U1_V240425 Command Injection (Third Party Advisory, VDB Entry, third-party-advisory)
- cna@vuldb.com (Exploit, Third Party Advisory, exploit)
Frequently asked questions
- What is CVE-2026-3661?
- CVE-2026-3661 is a medium-severity vulnerability in Wavlink Wl-nu516u1, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 4.7/10. Published 2026-03-07.
- How severe is CVE-2026-3661?
- Medium severity. CVSS v3 base score is 4.7 out of 10.