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Advisory (ICSA-18-151-03)

Yokogawa STARDOM Controllers

Original release date: May 31, 2018

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  • CVSS v3 9.8
  • ATTENTION: Exploitable remotely/low skill level to exploit
  • Vendor: Yokogawa
  • Equipment: STARDOM Controllers
  • Vulnerability: Hard-coded Credentials


Successful exploitation of this vulnerability could allow an attacker to gain access to the affected device, which could result in remote code execution.



Yokogawa reports the vulnerability affects the following STARDOM Controller products:

  • FCJ (R4.02 and prior),
  • FCN-100 (R4.02 and prior),
  • FCN-RTU (R4.02 and prior), and
  • FCN-500 (R4.02 and prior).



The affected controllers utilize hard-coded credentials that could allow an attacker to gain unauthorized administrative access to the device, which could result in remote code execution.

CVE-2018-10592 has been assigned to this vulnerability. A CVSS v3 base score of 9.8 has been calculated; the CVSS vector string is (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).


  • Critical Infrastructure Sectors: Critical Manufacturing, Energy, and Food and Agriculture
  • Countries/Areas Deployed: Worldwide
  • Company Headquarters Location: Japan


VDLab of Venustech and Dongfang Electric Corporation (DEC) reported this vulnerability to NCCIC.


Yokogawa has recommended users upgrade the FCN/FCJ software to Version R4.10 or later and reports that the vulnerability is remediated in that version. Yokogawa strongly suggests all users introduce appropriate security measures not only for the vulnerability identified but also to the overall system.

Yokogawa recommends users with questions related to this report and information on obtaining the updates, please utilize the Product Inquiry contact details at the following location:


Yokogawa’s Security Advisory Report, YSAR-18-0004: Vulnerability of hardcoded password in STARDOM controllers, and other Yokogawa security reports are available at the following URL:


NCCIC recommends users take defensive measures to minimize the risk of exploitation of this vulnerability. Specifically, users should:

  • Minimize and restrict remote device access where remote access is not required.
  • Minimize network exposure for all control system devices and/or systems, and ensure that they are not accessible from the Internet.
  • Locate control system networks and remote devices behind firewalls, and isolate them from the business network.
  • When remote access is required, use secure methods, such as Virtual Private Networks (VPNs), recognizing that VPNs may have vulnerabilities and should be updated to the most current version available. Also recognize that VPN is only as secure as the connected devices.

NCCIC reminds organizations to perform proper impact analysis and risk assessment prior to deploying defensive measures.

NCCIC also provides a section for control systems security recommended practices on the ICS-CERT web page. Several recommended practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies.

Additional mitigation guidance and recommended practices are publicly available on the ICS-CERT website in the Technical Information Paper, ICS-TIP-12-146-01B--Targeted Cyber Intrusion Detection and Mitigation Strategies.

Organizations observing any suspected malicious activity should follow their established internal procedures and report their findings to NCCIC for tracking and correlation against other incidents.

No known public exploits specifically target this vulnerability.

Contact Information

For any questions related to this report, please contact the NCCIC at:

Toll Free: 1-888-282-0870

For industrial control systems cybersecurity information:  http://ics-cert.us-cert.gov 
or incident reporting:  https://ics-cert.us-cert.gov/Report-Incident?

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