CVE-2026-124580
Deferred Deferred - Pending Action

Command Injection in Feiyuxing VW2100 and VEC10GP

Publication date: 2026-11-09

Last updated on: 2026-11-09

Assigner: VulDB

Description
A vulnerability was found in Chengdu Feiyuxing Technology VW2100 and VEC10GP 1.0 B-MB3W202-210825-r11775. This impacts the function handle_wechat_cn_wifi of the file var/html/webserver of the component Weixin Auth Endpoint. The manipulation of the argument extend results in os command injection. The attack can be executed remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

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Meta Information

Published
2026-11-09
Last Modified
2026-11-09
Generated
2026-11-09
AI Q&A
2026-11-09
EPSS Evaluated
N/A
NVD
CVE-2026-124580
EUVD
EUVD-2026-119876

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
chengdu_feiyuxing_technology vw2100 1.0
chengdu_feiyuxing_technology vec10gp 1.0

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.

Attack-Flow Graph

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Executive Summary

This is an unauthenticated OS command injection vulnerability in Feiyuxing VW2100 and VEC10GP routers. It exists in the weixin_auth.cgi endpoint where the extend parameter is improperly handled. Attackers can inject shell commands by crafting malicious input that breaks out of a string and executes arbitrary commands as root without authentication.

Detection Guidance

To detect this vulnerability, scan for exposed Feiyuxing VW2100 or VEC10GP devices on your network. Check if the /weixin_auth.cgi endpoint is accessible. Use a crafted HTTP POST request with a payload like 'extend=;id;#' to test for command injection. If the response includes command output, the system is vulnerable.

Impact Analysis

An attacker could remotely execute arbitrary commands on the router with root privileges. This could allow full control over the device, including accessing sensitive data, modifying configurations, or using the router as a pivot point for further attacks within the network.

Mitigation Strategies

Immediately restrict access to the web admin interface of affected devices. Disable the /weixin_auth.cgi endpoint if possible. Update firmware to the latest version if available. Monitor network traffic for suspicious POST requests to this endpoint. Consider isolating vulnerable devices from critical network segments.

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