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Security Advisories

SUMMARY

CVE-2025-9315: Unauthenticated Device Registration Vulnerability in MXsecurity Series

This security advisory addresses a vulnerability identified in the  MXsecurity Series.

CVE-2025-9315

An unauthenticated device registration vulnerability, caused by Improperly Controlled Modification of Dynamically-Determined Object Attributes, has been identified in the MXsecurity Series. An unauthenticated remote attacker can exploit this vulnerability by sending a specially crafted JSON payload to the device's registration endpoint /api/v1/devices/register, allowing the attacker to register unauthorized devices without authentication. Although exploiting this vulnerability has limited modification of data, there is no impact to the confidentiality and availability of the affected device, as well as no loss of confidentiality, integrity, and availability within any subsequent systems.

Because the vulnerability is assessed as medium severity, users are suggested to evaluate their environment and schedule the update in the next maintenance or update cycle.

 

The Identified Vulnerability Type and Potential Impact

CVE ID Vulnerability Type Impact
CVE-2025-9315

CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes

CAPEC-77: Manipulating User-Controlled Variables

Vulnerability Scoring Details 

CVE ID
Base Score
Vector
Severity

Unauthenticated

Remote Exploits

CVE-2025-9315

CVSS 4.0: 6.3

AV:N/AC:H/AT:N/PR:N/UI:N/

VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

Medium Yes
AFFECTED PRODUCTS AND SOLUTIONS

Solutions

Moxa has developed appropriate solutions to address these vulnerabilities. The solutions for the affected products are listed in the following table: 

Product Series Affected Versions Solutions
MXsecurity Series Software v2.3.0 and earlier 

Software v2.3.1 or later

(download from Moxa Software Licensing System)

 

Mitigations

To mitigate the risk associated with the vulnerability, we recommend the following actions:

  • Refer to the General Security Recommendations section to further strengthen your security context.

 

General Security Recommendations

To safeguard devices and networks, we recommend implementing the following recommendations to mitigate potential risks:

  1. Restrict Network Access
    • Use firewalls or access control lists (ACLs) to limit communication to trusted IP addresses and networks.
    • Segregate operational networks from other networks (e.g., enterprise networks) using VLANs or physical separation.
  2. Minimize Exposure
    • Avoid exposing devices directly to the Internet.
    • Disable unused network services and ports to reduce the attack surface.
  3. Enhance Device Authentication and Access Control
    • Implement multi-factor authentication (MFA) for accessing critical systems.
    • Use role-based access control (RBAC) to enforce the principle of least privilege.
  4. Regularly Update Firmware and Software
    • Keep devices updated with the latest firmware versions and security patches.
    • Establish a regular patch management schedule to address newly identified vulnerabilities.
  5. Secure Remote Access
    • Use encrypted communication protocols (e.g., VPN, SSH) for remote access.
    • Restrict remote access to authorized personnel only and enforce strong authentication mechanisms.
  6. Implement Anomaly Detection Techniques
    • Monitor network traffic and device behavior for unusual or unauthorized activities.
    • Use tools or techniques that can identify anomalies and provide alerts for potential threats.
  7. Implement Logging and Monitoring
    • Enable event logging and maintain audit trails on devices.
    • Regularly review logs for anomalies and unauthorized access attempts.
  8. Conduct Regular Security Assessments
    • Perform vulnerability assessments to identify potential risks.
    • Regularly review device configurations to ensure compliance with security policies.

 

Acknowledgement

We would like to express our gratitude to a cybersecurity researcher, Leo Lin, for reporting the vulnerability, collaborating with us to enhance the security of our products, and contributing to our efforts to deliver better service to our customers. 

 

Revision History:

VERSION DESCRIPTION RELEASE DATE
1.0 First release December 10, 2025

Relevant Products

MXsecurity Series ·

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