CVE-2025-36535

Summary

The embedded web server lacks authentication and access controls, allowing unrestricted remote access. This could lead to configuration changes, operational disruption, or arbitrary code execution depending on the environment and exposed functionality.

Affected Software

VendorProductVersion RangeStatus
AutomationDirectMB-GatewayAllaffected

Weaknesses

  • CWE-306: CWE-306 Missing Authentication for Critical Function

Workarounds

The hardware limitation of MB-Gateway does not provide for the implementation of proper access control update. AutomationDirect recommends that users plan for replacement of MB-Gateway with EKI-1221-CE https://www.automationdirect.com/adc/shopping/catalog/communications/protocol_gateways/modbus_gateways/eki-1221-ce .

If an immediate replacement is not feasible, AutomationDirect recommends considering the following interim steps until the programming software can be updated:

  • Restrict network exposure: Ensure devices affected are not accessible from the Internet or untrusted networks. Place them behind firewalls.
  • Use dedicated, secure internal networks or air-gapped systems for communication with programmable devices.
  • Control Access: Restrict physical and logical access to authorized personnel only.
  • Implement Whitelisting: Use application whitelisting to allow only pre-approved and trusted access. Block untrusted or unauthorized applications.
  • Monitor and Log Activity: Enable logging and monitoring of system activities to detect potential anomalies or unauthorized actions. Regularly review logs for suspicious activity.
  • Use Secure Backup and Recovery: Regularly back up the workstation and its configurations to a secure location. Test recovery procedures to ensure minimal downtime in the event of an incident.
  • Plan for device replacement: Organizations should begin evaluating and migrating to supported hardware with active vendor support.

ADP Enrichment

CISA ADP Vulnrichment

  • SSVC:
  • Exploitation: none
    • Automatable: yes
    • Technical Impact: total

References