CVE-2026-8188
Published: 09 May 2026
Summary
CVE-2026-8188 is a low-severity Command Injection (CWE-77) vulnerability in Wavlink Wl-Nu516U1 Firmware. Its CVSS base score is 2.1 (Low).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploit Public-Facing Application (T1190); ranked in the top 8.2% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.
Deeper analysis
A vulnerability has been identified in the Wavlink NU516U1 router running firmware M16U1_V240425. It resides in the change_wifi_password function within /cgi-bin/adm.cgi, where unsanitized input to the wl_channel, wl_Pass, and EncrypType arguments permits operating system command injection. The issue is tracked under CWE-77 and CWE-78 and carries a CVSS 4.0 score of 2.1, reflecting that exploitation requires an authenticated but low-privileged network attacker.
An attacker with valid credentials can submit crafted parameters to the CGI endpoint and execute arbitrary commands on the device. Because the attack is remote and the public exploit has already been published, an authenticated user could obtain limited control over the router’s configuration or underlying operating system without user interaction.
The EPSS score for this CVE rose from a low baseline to a recorded peak of 0.0106, indicating measurable growth in exploitation interest after disclosure. No vendor patch or mitigation guidance has been published in the referenced sources, though the vendor was notified prior to public release.
OWASP Top 10 for Web (2025)
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2026-28915
Vulnerability details
A vulnerability has been found in Wavlink NU516U1 M16U1_V240425. Affected is the function change_wifi_password of the file /cgi-bin/adm.cgi. The manipulation of the argument wl_channel/wl_Pass/EncrypType leads to os command injection. It is possible to initiate 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.
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
OS command injection in public-facing router CGI script directly enables remote exploitation of the web application (T1190) for Unix shell command execution (T1059.004).
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Affected Assets
Mitigating Controls
Likely Mitigating Controls AI
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.