SECURELYN

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.

Scores

7.3
CVSS 7.3 out of 10, high severity.
10.4%
EPSS 10.4% chance of exploitation in the next 30 days.

The facts

Published
6 March 2026
Last changed
17 June 2026
NVD status
Analyzed
Severity
High, CVSS 7.3 out of 10 (version 4.0)
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/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…
Weakness
Affects
  • wavlink wl-nu516u1 firmware
Known exploited
Not in the CISA Known Exploited Vulnerabilities catalogue in this build.
EPSS
10.4% chance of exploitation activity in the next 30 days (percentile 96).

Is there a Securelyn advisory?

Not yet. Securelyn writes plain-English advisories for the flaws that matter most to businesses. Subscribe to the digest to hear about them.

References