CVE-2026-3025: ShuoRen Smart Heating Platform RCE Flaw

CVE-2026-3025 Overview

A critical unrestricted file upload vulnerability has been discovered in the ShuoRen Smart Heating Integrated Management Platform version 1.0.0. This vulnerability exists in the /MP/Service/Webservice/ExampleNodeService.asmx endpoint, where improper access control allows attackers to manipulate the File argument to upload arbitrary files to the server. The vulnerability can be exploited remotely without authentication, potentially enabling attackers to upload malicious files such as web shells or executable payloads to compromise the affected system.

Critical Impact

Remote attackers can exploit this unrestricted file upload vulnerability to potentially gain unauthorized access to the server by uploading malicious files, leading to remote code execution, data theft, or further network compromise.

Affected Products

• ShuoRen Smart Heating Integrated Management Platform 1.0.0
• Systems exposing the vulnerable /MP/Service/Webservice/ExampleNodeService.asmx endpoint
• IoT/Industrial control systems utilizing this platform

Discovery Timeline

• 2026-02-23 - CVE-2026-3025 published to NVD
• 2026-02-24 - Last updated in NVD database

Technical Details for CVE-2026-3025

Vulnerability Analysis

This vulnerability stems from improper access control (CWE-284) in the file upload functionality of the ShuoRen Smart Heating Integrated Management Platform. The affected web service endpoint at /MP/Service/Webservice/ExampleNodeService.asmx fails to properly validate and restrict file uploads, allowing attackers to upload arbitrary files to the server.

The vulnerability is remotely exploitable and requires no authentication or user interaction, making it particularly dangerous for internet-exposed installations. Successful exploitation could allow an attacker to upload malicious payloads such as web shells, scripts, or executables that could then be executed on the target system.

According to the vulnerability disclosure, the vendor was contacted about this issue but did not respond, leaving users without an official patch or mitigation guidance. An exploit for this vulnerability has been published and may be actively used.

Root Cause

The root cause of this vulnerability is improper access control in the file upload handling mechanism. The application fails to implement adequate restrictions on the types of files that can be uploaded, their content, or the destination paths. The File argument in the vulnerable endpoint can be manipulated to bypass any existing upload restrictions, enabling unrestricted file upload capabilities.

Attack Vector

The attack vector for CVE-2026-3025 is network-based, allowing remote exploitation without requiring local access to the system. An attacker can craft malicious requests to the /MP/Service/Webservice/ExampleNodeService.asmx endpoint, manipulating the File parameter to upload arbitrary files.

A typical attack scenario would involve:

1. Identifying an exposed instance of ShuoRen Smart Heating Integrated Management Platform
2. Crafting a malicious ASMX web service request targeting the ExampleNodeService.asmx endpoint
3. Manipulating the File argument to upload a web shell or malicious script
4. Accessing the uploaded file to execute arbitrary commands on the server

The vulnerability exploits the lack of proper file type validation and access controls in the web service, allowing unrestricted file uploads that can lead to complete system compromise.

Detection Methods for CVE-2026-3025

Indicators of Compromise

• Unexpected files appearing in web-accessible directories on the server
• HTTP POST requests to /MP/Service/Webservice/ExampleNodeService.asmx with suspicious file uploads
• Web shell signatures or executable files in upload directories
• Unusual outbound network connections from the web server

Detection Strategies

• Monitor web server logs for requests to /MP/Service/Webservice/ExampleNodeService.asmx containing file upload operations
• Implement file integrity monitoring on directories accessible through the web service
• Deploy web application firewalls (WAF) with rules to detect unrestricted file upload attempts
• Configure endpoint detection to alert on creation of executable or script files in web directories

Monitoring Recommendations

• Enable detailed logging for all requests to ASMX web service endpoints
• Implement real-time alerting for file creation events in web server directories
• Monitor for suspicious process execution originating from web server processes
• Track network connections from web servers to identify potential command and control activity

How to Mitigate CVE-2026-3025

Immediate Actions Required

• Restrict network access to the vulnerable endpoint /MP/Service/Webservice/ExampleNodeService.asmx using firewall rules
• Implement IP whitelisting to limit access to trusted networks only
• Consider disabling the affected web service endpoint if not essential for operations
• Deploy web application firewall rules to block suspicious file upload attempts

Patch Information

No official patch is currently available from the vendor. According to the vulnerability disclosure, the vendor was contacted about this issue but did not respond. Organizations using the ShuoRen Smart Heating Integrated Management Platform should implement the workarounds below and monitor for any vendor updates.

For additional technical details, refer to the VulDB vulnerability entry and VulDB CTI information.

Workarounds

• Disable or remove the vulnerable ExampleNodeService.asmx endpoint if not required
• Implement strict network segmentation to isolate the affected platform from untrusted networks
• Deploy a reverse proxy with request filtering to block malicious file uploads
• Add authentication requirements to the web service endpoint using IIS configuration
• Implement file upload restrictions at the web server level to only allow specific file types

# IIS URL Rewrite rule to block access to vulnerable endpoint
# Add this to web.config in the application root
<configuration>
  <system.webServer>
    <rewrite>
      <rules>
        <rule name="Block Vulnerable Endpoint" stopProcessing="true">
          <match url="^MP/Service/Webservice/ExampleNodeService\.asmx$" />
          <action type="CustomResponse" statusCode="403" statusReason="Forbidden" statusDescription="Access Denied" />
        </rule>
      </rules>
    </rewrite>
  </system.webServer>
</configuration>