CVE-2026-82932 in mH-DEVELOPER
Summary
by MITRE • 09/28/2026
mH-DEVELOPER smart home module does not load any firewall rules at startup. This leaves all listening services, including SSH, HTTP, WebSocket, and Node-RED, fully exposed on the LAN without access control. Any client on the same network can reach every service.
This issue was fixed in version 3.0.30
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Analysis
by VulDB Data Team • 09/28/2026
The mH-DEVELOPER smart home module exhibits a critical configuration flaw wherein it fails to initialize or load any firewall rules during its startup sequence. This absence of network filtering mechanisms results in all listening services being exposed directly on the local area network without any form of access control or packet inspection. The affected services include SSH, HTTP, WebSocket, and Node-RED, which are typically used for remote management, web interface interaction, real-time communication, and automation scripting respectively. By leaving these interfaces fully accessible to any client on the same subnet, the device effectively operates as an open gateway within the home network environment.
From a technical perspective, this vulnerability represents a severe misconfiguration that violates fundamental principles of defense in depth. The lack of firewall rules means there is no stateful packet inspection or source IP filtering to restrict access based on trust levels. Consequently, any malicious actor with physical or wireless connectivity to the local network can interact directly with these services without authentication barriers imposed by network-level controls. This exposure significantly expands the attack surface, allowing for potential exploitation through brute-force attacks against SSH, cross-site scripting or command injection via HTTP and WebSocket interfaces, and unauthorized automation execution through Node-RED.
The operational impact of this vulnerability is substantial, as it compromises both confidentiality and integrity within the home network ecosystem. An attacker could potentially gain remote shell access via unsecured SSH connections, intercept sensitive data transmitted over unencrypted HTTP channels, or manipulate smart home automations by injecting malicious flows into Node-RED. Furthermore, because these services are exposed without restriction, they serve as ideal pivot points for lateral movement to other devices on the network, including IoT sensors, security cameras, and personal computers that may have weaker security postures themselves.
This issue aligns with CWE-16, known as Configuration, which describes flaws where a product is set up or configured in an insecure way. Additionally, it relates to ATT&CK technique T1046, Network Service Discovery, as the open ports allow attackers to easily enumerate and identify available services for further exploitation. The vulnerability also touches upon CWE-284, Improper Access Control, since there are no restrictions on who can access these network resources.
To mitigate this risk, users should immediately update the mH-DEVELOPER smart home module to version 3.0.30 or later, where this startup configuration error has been resolved. Until an upgrade is performed, it is advisable to isolate the device in a separate VLAN with strict firewall rules applied at the router level to restrict access only from trusted management stations. Additionally, enabling strong authentication mechanisms on all exposed services and ensuring that HTTPS is enforced for web interfaces can provide supplementary layers of security while waiting for the firmware patch. Regular network monitoring should also be implemented to detect any unauthorized connection attempts or anomalous traffic patterns originating from the device.