CVE-2026-19976
Received Received - Intake

Command Injection in COMFAST CF-N1-S Router

Publication date: 2026-08-17

Last updated on: 2026-08-17

Assigner: VulDB

Description
A security vulnerability has been detected in COMFAST CF-N1-S 2.6.0.1. Impacted is the function sub_44A968 of the file /cgi-bin/mbox-config?method=SET&section=ptest_macaddress. Such manipulation of the argument macaddress leads to command injection. The attack may be launched remotely. The exploit has been disclosed publicly and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

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Meta Information

Published
2026-08-17
Last Modified
2026-08-17
Generated
2026-08-17
AI Q&A
2026-08-17
EPSS Evaluated
N/A
NVD
CVE-2026-19976
EUVD
EUVD-2026-60036

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
comfast cf-n1-s 2.6.0.1

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 is a command injection vulnerability in COMFAST CF-N1-S version 2.6.0.1. It exists in the function sub_44A968 of the file /cgi-bin/mbox-config?method=SET&section=ptest_macaddress. The vulnerability allows manipulation of the macaddress argument to execute arbitrary commands remotely.

Detection Guidance

This vulnerability involves command injection via the macaddress parameter in the /cgi-bin/mbox-config endpoint. To detect it, inspect network traffic for requests to this endpoint with unusual or malicious macaddress values. Check system logs for unexpected command execution or unauthorized modifications.

Impact Analysis

An attacker could exploit this to run unauthorized commands on the device remotely. This may lead to full system compromise, data theft, or disruption of device functionality. The public disclosure increases the risk of exploitation.

Compliance Impact

This vulnerability allows remote command injection via manipulated macaddress input in the COMFAST CF-N1-S device. Such unauthorized access could lead to data breaches, unauthorized data access, or modification, which may violate GDPR (data protection) and HIPAA (health data security) requirements depending on the system's use case.

Mitigation Strategies

Immediately restrict access to the /cgi-bin/mbox-config endpoint, especially the method=SET&section=ptest_macaddress functionality. Update or patch the affected COMFAST CF-N1-S device if a fix is available. Monitor network traffic for exploitation attempts and disable the vulnerable service if no patch is provided.

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