RCE in Wavlink Wl-Nu516u1
CVE-2026-3612
A vulnerability was determined in Wavlink WL-NU516U1 V240425. This affects the function sub_405AF4 of the file /cgi-bin/adm.cgi of the component OTA Online Upgrade. This manipulation of the argument firmware_url causes command injection. It is possible to initiate the attack remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.143 (96.6th percentile), scored .
Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 97th percentile — 96.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.104 · newest: 0.143 · change: +0.039
Affected products
- Wavlink Wl-Nu516u1 — versions V240425
- Wavlink Wl-Nu516u1 Firmware — versions m16u1_v240425
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
- vuldb.com/ (signature, Permissions Required, permissions-required, VDB Entry)
- vuldb.com/ (VDB Entry, Third Party Advisory, third-party-advisory)
- github.com/Wlz1112/WAVLINK-NU516-V240425/blob/main/firmware_url.md (Exploit, Third Party Advisory, exploit)
Frequently asked questions
- What is CVE-2026-3612?
- CVE-2026-3612 is a high-severity vulnerability in Wavlink Wl-Nu516u1, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 7.2/10. Published 2026-03-06.
- How severe is CVE-2026-3612?
- High severity. CVSS v3 base score is 7.2 out of 10.