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Security Advisories

SUMMARY

CVE-2024-12297: Frontend Authorization Logic Disclosure Vulnerability in Ethernet Switches

  • Security Advisory ID: MPSA-241409
  • Version: V1.0
  • Release Date: Feb 04, 2026
  • Reference:

    CVE-2024-12297 (Moxa)

Multiple Moxa's Ethernet switches are vulnerable to an authentication bypass because of flaws in their authorization mechanism. Despite client-side and back-end server verification, attackers can exploit weaknesses in its implementation. This vulnerability may enable brute-force attacks to guess valid credentials or MD5 collision attacks to forge authentication hashes, potentially compromising the security of the device. 

Since this issue is considered high severity, users should immediately apply the solutions to mitigate associated security risks.

 

The Identified Vulnerability Type and Potential Impact

Item Vulnerability Type Impact
1

CWE-656: Reliance on Security Through Obscurity

CAPEC-49: Password Brute Forcing

Vulnerability Scoring Details 

ID
Base Score
Vector

Unauthenticated

Remote Exploits

CVE-2024-12297

CVSS 4.0: 9.2

AV:N/AC:L/AT:P/PR:N/UI:N/

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

Yes
AFFECTED PRODUCTS AND SOLUTIONS

Solutions:

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

Product Series Affected Versions Solutions

TN-A Series

  • TN-4500A Series
  • TN-5500A Series
Firmware v4.1 and earlier Please contact Moxa Technical Support for the security patch (v3.13.255)

TN-G Series

  • TN-G4500 Series
  • TN-G6500 Series
Firmware v5.5 and earlier Please contact Moxa Technical Support for the security patch (v5.5.255)

Mitigations

For users who may not be able to perform a firmware update, we provide the following recommended mitigation measures as an alternative to mitigate the risk associated with the vulnerability.

  • 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.

 

Revision History:

VERSION DESCRIPTION RELEASE DATE
1.0 First release February 4, 2026

Relevant Products

TN-4500A Series · TN-5500A Series · TN-G4500 Series · TN-G6500 Series ·

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