CVE-2026-94138
Received Received - Intake

Command Injection in Feiyu Star Router

Publication date: 2026-09-21

Last updated on: 2026-09-21

Assigner: VulDB

Description
A security flaw has been discovered in Chengdu Feiyuxing Technology Feiyu Star Router B-MB5E202-210322-r11656. This impacts an unknown function of the file /send_order.cgi?parameter=del_expmac. The manipulation of the argument mac results in command injection. The attack may be launched remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

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Meta Information

Published
2026-09-21
Last Modified
2026-09-21
Generated
2026-09-21
AI Q&A
2026-09-21
EPSS Evaluated
N/A
NVD
CVE-2026-94138
EUVD
EUVD-2026-83831

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
chengdu_feiyuxing_technology feiyu_star_router *

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
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.
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 vulnerability is a command injection flaw in the Chengdu Feiyuxing Technology Feiyu Star Router B-MB5E202-210322-r11656. It exists in the /send_order.cgi?parameter=del_expmac file where the 'mac' argument can be manipulated to execute arbitrary commands. The issue allows remote attackers to inject and execute commands due to insufficient input validation.

Detection Guidance

Detecting this vulnerability requires checking for the presence of the affected Feiyu Star Router model B-MB5E202-210322-r11656 and testing for command injection via the /send_order.cgi?parameter=del_expmac endpoint with the mac argument. Use network scanning tools like nmap to identify devices with the router model. Test for the vulnerability by sending crafted requests to the endpoint and observing if command injection occurs.

Impact Analysis

This vulnerability may allow remote attackers to execute arbitrary commands on the affected router. This could lead to unauthorized access, data theft, or disruption of network services. Since the exploit is publicly available, the risk of exploitation is higher.

Compliance Impact

This vulnerability allows remote command injection via the /send_order.cgi?parameter=del_expmac endpoint, which could lead to unauthorized system access. Such flaws may violate compliance requirements for data protection and security controls in standards like GDPR (data integrity and confidentiality) and HIPAA (access controls and audit logging).

Mitigation Strategies

Immediately isolate the affected router from your network to prevent remote exploitation. Disable access to the /send_order.cgi?parameter=del_expmac endpoint if possible. Update the router firmware if a patch is released by the vendor. Monitor network traffic for suspicious activity targeting this endpoint. Consider replacing the device if no updates are available.

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