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Vulnerability record · CVE-2026-3661 · published 7 March 2026

CVE-2026-3661: Wavlink wl-nu516u1 firmware injection vulnerability

Wavlink · Wl Nu516u1 Firmware

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. The exploit has been published and may be used. The vendor was contacted early about this disclosure.

2.0 CVSS 4.0 Low EPSS 11% · top 4.3% CWE-74 · InjectionCWE-77 · Command injection
2.0CVSS 4.0 base score, v2 5.8
11%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References, 1 tagged exploit
17 Jun 2026Last modified by NVD

Description

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. The exploit has been published and may be used. The vendor was contacted early about this disclosure.

CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:L/VI:L/VA:L/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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/jinhao118/cve/blob/main/WAVLINK_1.md ExploitThird Party Advisory
https://vuldb.com/?ctiid.349550 Permissions RequiredVDB Entry
https://vuldb.com/?id.349550 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.758227 Third Party AdvisoryVDB Entry

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-3661), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.