CVE-2026-3662
Published: 07 March 2026
Summary
CVE-2026-3662 is a medium-severity Injection (CWE-74) vulnerability in Wavlink Wl-Nu516U1 Firmware. Its CVSS base score is 4.7 (Medium).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked at the 46.0th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Threat & Defense at a Glance
Threat & Defense Details
Likely Mitigating ControlsAI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Developer assessments and testing (including injection-focused techniques) identify improper neutralization of special elements, and the verifiable flaw remediation corrects them pre-deployment.
Identifies indicators of injection attacks (command, SQL, LDAP, etc.) via anomaly and attack monitoring.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Command injection in exposed CGI web interface (adm.cgi) directly enables remote exploitation of a public-facing application (T1190) and results in arbitrary Unix shell command execution on the Linux-based firmware (T1059.004).
NVD Description
A vulnerability has been found in Wavlink WL-NU516U1 240425. This vulnerability affects the function usb_p910 of the file /cgi-bin/adm.cgi. Such manipulation of the argument Pr_mode leads to command injection. It is possible to launch the attack remotely. The exploit has…
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been disclosed to the public and may be used. The vendor was contacted early about this disclosure.
Deeper analysisAI
CVE-2026-3662 is a command injection vulnerability in the Wavlink WL-NU516U1 device running firmware version 240425. The issue resides in the usb_p910 function within the /cgi-bin/adm.cgi script, where manipulation of the Pr_mode argument enables arbitrary command execution. Classified under CWE-74 and CWE-77, it carries a CVSS v3.1 base score of 4.7 (AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L) and was published on 2026-03-07.
The vulnerability can be exploited remotely over the network with low complexity and no user interaction required, but demands high privileges (PR:H) from the attacker. Successful exploitation allows limited impacts: low confidentiality (C:L), integrity (I:L), and availability (A:L) violations through injected commands, potentially enabling unauthorized actions within the device's privileged context.
Advisories from VulDB and a related GitHub repository detail the vulnerability, noting that the exploit has been publicly disclosed and may be actively used. The vendor was contacted early regarding the issue, though no specific patches or mitigations are outlined in the available references.
The public disclosure of the exploit code heightens the risk for unpatched Wavlink WL-NU516U1 devices.
Details
- CWE(s)