CVE-2026-120276
Received Received - Intake

Command Injection in WAVLINK WN536AX6-A Router

Publication date: 2026-11-02

Last updated on: 2026-11-02

Assigner: VulDB

Description
A weakness has been identified in WAVLINK WN536AX6-A V260507_2.0.0. This vulnerability affects the function sub_416760 of the file /bin/ioos of the component Web Management Interface. This manipulation of the argument group_name causes os command injection. It is possible to initiate the attack remotely. The exploit has been made available to the public and could be used for attacks. The vendor was contacted early about this disclosure.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-11-02
Last Modified
2026-11-02
Generated
2026-11-02
AI Q&A
2026-11-02
EPSS Evaluated
N/A
NVD
CVE-2026-120276

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
WAVLINK WN536AX6-A V260507_2.0.0

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
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.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

CVE-2026-120276 is an unauthenticated OS command injection flaw in WAVLINK WN536AX6-A routers. It allows remote attackers to execute arbitrary commands with root privileges by manipulating the group_name parameter in the Web Management Interface. The vulnerability exists in the /bin/ioos component which processes OpenVPN client group commands without proper input validation.

Detection Guidance

Check if your WAVLINK WN536AX6-A router is running the vulnerable firmware version. Test for the command injection vulnerability by sending a crafted request to the web interface or OpenVPN group command handler. Use tools like curl to send a payload such as 'a';id;' to the group_name parameter in the openvpn_cli_group or wireguard_cli_group endpoints.

Impact Analysis

This vulnerability allows attackers to gain full root remote code execution (RCE) on affected devices. They can execute arbitrary commands, steal credentials, or move laterally into the local network. Exploitation is possible remotely without authentication through either loopback/SSRF or the default web interface on factory-reset devices with empty passwords.

Mitigation Strategies

Immediately update the router firmware to the latest patched version if available. Disable remote access to the web interface if not required. Change the default password to a strong one. Block external access to port 81 on the router to prevent SSRF attacks. Monitor network traffic for suspicious activity targeting the vulnerable endpoints.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-120276. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart

Security Radar

News mentioning this vulnerability
Loading related security news...