CVE-2026-18590
Received Received - Intake

Remote Code Execution in Wavlink WL-NU516U1

Publication date: 2026-08-03

Last updated on: 2026-08-03

Assigner: VulDB

Description
A vulnerability was determined in Wavlink WL-NU516U1 708c073-mt7628. Affected is the function set_sys_adm of the file adm.cgi of the component Admin Password Handler. This manipulation causes os command injection. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized. It is suggested to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

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Meta Information

Published
2026-08-03
Last Modified
2026-08-03
Generated
2026-08-03
AI Q&A
2026-08-03
EPSS Evaluated
N/A
NVD
CVE-2026-18590
EUVD
EUVD-2026-52223

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
wavlink wl-nu516u1 to 708c073-mt7628 (inc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-78 The product constructs all or part of an OS command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended OS command when it is sent to a downstream component.
CWE-77 The product constructs all or part of a command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended command when it is sent to a downstream component.

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Executive Summary

This vulnerability is an OS command injection flaw in Wavlink WL-NU516U1 devices. It exists in the set_sys_adm function of the adm.cgi file, which handles admin password changes. An attacker can remotely inject and execute arbitrary commands on the affected device due to improper input validation.

Detection Guidance

Detecting this vulnerability requires checking for the presence of the vulnerable Wavlink WL-NU516U1 device and inspecting network traffic for suspicious commands sent to adm.cgi. Look for unauthorized admin password changes or unexpected system commands.

Impact Analysis

This vulnerability allows remote attackers to execute arbitrary commands on your Wavlink WL-NU516U1 device. This could lead to unauthorized access, data theft, device takeover, or disruption of network services. Attackers may gain control over the device and connected networks.

Compliance Impact

This vulnerability allows remote command injection via the Admin Password Handler in Wavlink WL-NU516U1, which could lead to unauthorized access and data breaches. Such breaches may violate GDPR's data protection requirements and HIPAA's security rules for protected health information if exploited.

Mitigation Strategies

Upgrade the affected Wavlink WL-NU516U1 device to the fixed version provided by the vendor to address the OS command injection vulnerability in the Admin Password Handler component.

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