CVE-2026-120198
Received Received - Intake

Command Injection in WAVLINK WL-WN530BE1-A

Publication date: 2026-11-01

Last updated on: 2026-11-01

Assigner: VulDB

Description
A vulnerability has been found in WAVLINK WL-WN530BE1-A V251117. Affected is the function con_check_read_finish of the file /protocol.csp. Such manipulation of the argument group_name/IP-FROM leads to command injection. It is possible to launch the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure.

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Meta Information

Published
2026-11-01
Last Modified
2026-11-01
Generated
2026-11-01
AI Q&A
2026-11-01
EPSS Evaluated
N/A
NVD
CVE-2026-120198
EUVD
EUVD-2026-114773

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
WAVLINK WL-WN530BE1-A V251117

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
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.
CWE-74 The product constructs all or part of a command, data structure, or record using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify how it is parsed or interpreted when it is sent to a downstream component.

Attack-Flow Graph

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Executive Summary

This vulnerability is a command injection flaw in the WAVLINK WL-WN530BE1-A router firmware version M30BE1_V251117. It exists in the ioos binary when handling requests to /protocol.csp. The group_name parameter is improperly sanitized before being used in a system() call, allowing attackers to inject malicious commands. Additionally, the IP-FROM header can be spoofed to 127.0.0.1 to bypass authentication, enabling unauthenticated remote code execution as root.

Detection Guidance

To detect this vulnerability, scan your network for devices running WAVLINK WL-WN530BE1-A with firmware M30BE1_V251117. Check for open ports and HTTP requests to /protocol.csp with group_name or IP-FROM parameters. Use tools like Nmap to identify affected devices and analyze HTTP traffic for suspicious patterns.

Impact Analysis

An attacker could exploit this to execute arbitrary commands on your router with root privileges. This could allow them to take full control of the device, read sensitive files, install malware, or use it as a pivot point to attack other systems on your network. Since the exploit is public, attackers may already be scanning for vulnerable devices.

Mitigation Strategies

Immediately update the router firmware to the latest version if available. Disable remote access to the router's web interface. Block external HTTP requests to /protocol.csp at the network perimeter. Monitor network traffic for unusual activity involving group_name or IP-FROM parameters.

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