CVE-2026-8192

Wavlink NU516U1 adm.cgi wzdap os command injection

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Published May 9, 2026 CVSS 4.0 · 5.3 Medium EPSS 7.9% KEV · Not listed
Description
A security flaw has been discovered in Wavlink NU516U1 M16U1_V240425. This vulnerability affects the function wzdap of the file /cgi-bin/adm.cgi. Performing a manipulation of the argument EncrypType/wl_Pass is directly passed by the attacker/so we can control the EncrypType/wl_Pass results in os command injection. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure.

Analysis

AI-generated

Technical impact

A flaw in the wzdap function of the /cgi-bin/adm.cgi script on the Wavlink NU516U1 allows an attacker to inject arbitrary OS commands via the EncrypType/wl_Pass argument. The supplied value is passed directly to the operating system without validation, giving the attacker control over system command execution. The weakness touches both CWE-77 (OS Command Injection) and CWE-78 (OS Command Injection through Input).

Affected Systems

The affected vendor is Wavlink, with the specific product model NU516U1. The vulnerability exists in firmware build M16U1_V240425. No other versions or models are listed as affected.

Risk and Exploitability

The CVSS score is 5.3, indicating moderate severity, and the EPSS score is 9%. The vulnerability is not listed in the CISA KEV catalog. The flaw can be triggered remotely via HTTP requests to /cgi-bin/adm.cgi, and a public exploit is available. Once exploited, an attacker can run arbitrary commands on the device, potentially leading to full system compromise.

Remediation

No solution or workaround provided in the CVE record.

OpenCVE Recommended Actions

  • Apply the vendor’s firmware update that removes OS command injection from the wzdap function.
  • Block or restrict external access to the /cgi-bin/adm.cgi endpoint using a firewall or network ACL.
  • If an update is unavailable, disable the adm.cgi interface or isolate the device from untrusted networks.

Generated by OpenCVE AI on September 26, 2026 at 07:19 UTC.

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Wavlink wl-nu516u1 Firmware
CPEs cpe:2.3:h:wavlink:wl-nu516u1:-:*:*:*:*:*:*:*
cpe:2.3:o:wavlink:wl-nu516u1_firmware:m16u1_v240425:*:*:*:*:*:*:*
Vendors & Products Wavlink wl-nu516u1 Firmware
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}
Type Values Removed Values Added
First Time appeared Wavlink
Wavlink wl-nu516u1
Vendors & Products Wavlink
Wavlink wl-nu516u1
Type Values Removed Values Added
Description A security flaw has been discovered in Wavlink NU516U1 M16U1_V240425. This vulnerability affects the function wzdap of the file /cgi-bin/adm.cgi. Performing a manipulation of the argument EncrypType/wl_Pass is directly passed by the attacker/so we can control the EncrypType/wl_Pass results in os command injection. The attack may be initiated remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure.
Title Wavlink NU516U1 adm.cgi wzdap os command injection
Weaknesses CWE-77
CWE-78
References
Metrics cvssV2_0

{'score': 6.5, 'vector': 'AV:N/AC:L/Au:S/C:P/I:P/A:P/E:POC/RL:ND/RC:UR'}

cvssV3_0

{'score': 6.3, 'vector': 'CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}

cvssV3_1

{'score': 6.3, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R'}

cvssV4_0

{'score': 5.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P'}
Weaknesses
  • CWE-77

    Improper Neutralization of Special Elements used in a Command ('Command Injection')

  • CWE-78

    Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Sources

Status
PUBLISHED
Assigner
VulDB
Published
Updated
May 11, 2026, 3:11 PM
Reserved
May 8, 2026, 7:52 PM

View source JSON

Updated
May 11, 2026, 3:11 PM

JSON

Status
Analyzed
Published
May 9, 2026, 7:16 PM
Modified
Jul 24, 2026, 8:10 AM

View source JSON

No data.

Updated
Sep 26, 2026, 7:30 AM

JSON