ICS Advisory (ICSA-20-212-02)

Mitsubishi Electric Factory Automation Engineering Software (Update D)

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  • CVSS v3 8.3
  • ATTENTION: Exploitable remotely
  • Vendor: Mitsubishi Electric
  • Equipment: Mitsubishi Electric, Multiple Factory Automation Engineering Software products
  • Vulnerability: Permission Issues


This updated advisory is a follow-up to the advisory update titled ICSA-20-212-02 Mitsubishi Electric Factory Automation Engineering Software (Update C) that was published July 28, 2022, to the ICS webpage on cisa.gov/ics.


Successful exploitation of this vulnerability may enable the reading of arbitrary files, cause a denial-of-service condition, and allow execution of a malicious binary.



The following products and versions are affected:

  • CPU Module Logging Configuration Tool, versions 1.100E and prior
  • CW Configurator, Versions 1.010L and prior
  • Data Transfer, Versions 3.40S and prior
  • EZSocket, Versions 4.5 and prior
  • FR Configurator2, Versions 1.22Y and prior
  • GT Designer3 Version1 (GOT2000), Versions 1.235V and prior 
  • GT SoftGOT1000 Version3, 3.200J and prior
  • GT SoftGOT2000 Version1, Versions 1.235V and prior
  • GX LogViewer, Versions 1.100E and prior
  • GX Works2, Versions 1.592S and prior
  • GX Works3, Versions 1.063R and prior
  • M_CommDTM-HART, Version 1.00A
  • M_CommDTM-IO-Link, Versions 1.03D and prior
  • MELFA-Works, versions 4.3 and prior

--------- Begin Update D Part 1 of 2--------- 

  • MELSEC WinCPU Setting Utility, Versions 1.03D and prior

--------- End Update D Part 1 of 2--------- 

  • MELSOFT EM Software Development Kit (EM Configurator), Versions 1.010L and prior
  • MELSOFT FieldDeviceConfigurator, Versions 1.03D and prior
  • MELSOFT Navigator, Versions 2.62Q and prior
  • MH11 SettingTool Version2, versions 2.002C and prior
  • MI Configurator, Versions 1.004E and prior
  • Motorizer, Versions 1.005F and prior
  • MR Configurator2, Versions 1.105K and prior
  • MT Works2, Versions 1.156N and prior
  • MX Component, Versions 4.19V and prior
  • Network Interface Board CC IE Control utility, Versions 1.29F and prior
  • Network Interface Board CC IE Field Utility, Versions 1.16S and prior
  • Network Interface Board CC-Link Ver.2 Utility, Versions 1.23Z and prior
  • Network Interface Board MNETH utility, Versions 34L and prior
  • PX Developer, Versions 1.52E and prior
  • RT ToolBox2, Versions 3.72A and prior
  • RT ToolBox3, Versions 1.70Y and prior 
  • Setting/monitoring tools for the C Controller module (SW4PVC-CCPU), Versions 4.12N and prior



Successful exploitation of this vulnerability could allow an attacker to escalate privilege and execute malicious programs, which could cause a denial-of-service condition, and allow information to be disclosed, tampered with, and/or destroyed.

CVE-2020-14496 has been assigned to this vulnerability. A CVSS v3 base score of 8.3 has been calculated; the CVSS vector string is (AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H).




Younes Dragoni of Nozomi Networks, the Applied Risk research team, and Mashav Sapir of Claroty reported this vulnerability to Mitsubishi Electric.


Mitsubishi Electric recommends the following mitigations:

Download the latest version of each software product and update it, excluding the following products:

  • EZSocket is a communication middleware product for Mitsubishi Electric partner companies. Mitsubishi Electric will directly provide the fixed version to the partner companies.
  • Download and update the latest FR Configurator2 fixed version.

--------- Begin Update D Part 2 of 2--------- 

  • Mitsubishi Electric recommends users migrate to the MELSEC iQ-R series MELSEC WinCPU module, which uses the settings tool CW Configurator (SW1DND-RCCPU-E). The settings tool for MELSEC-Q series WinCPU module, MELSEC WinCPU Setting Utility, will not receive a patched version.

--------- End Update D Part 2 of 2--------- 

Mitsubishi Electric has provided firmware updates for the following products to fix the vulnerability. Refer to the manual for update help. See Mitsubishi Electric’s security advisory for more details.

  • CPU Module Logging Configuration Tool, Version 1.106K or later
  • CW Configurator, Version 1.011M or later
  • Data Transfer, Version 3.41T or later
  • EZSocket, Version 4.6 or later
  • FR Configurator2, Version 1.23Z or later
  • GT Designer3 Version1 (GOT2000), Version 1.236W or later
  • GT SoftGOT1000 Version3, Version 3.245F or later
  • GT SoftGOT2000 Version1, Version 1.236W or later
  • GX LogViewer, Version 1.106K or later
  • GX Works2, Version 1.595V or later
  • GX Works3, Version 1.065T or later
  • M_CommDTM-HART, Version 1.01B or later
  • M_CommDTM-IO-Link, Versions 1.04E or later 
  • MELFA-Works, Version 4.4 or later
  • MELSOFT EM Software Development Kit (EM Configurator), Version 1.015R or later
  • MELSOFT FieldDeviceConfigurator, Version 1.04E or later
  • MELSOFT Navigator, Version 2.70Y or later
  • MH11 SettingTool Version2, Version 2.003D or later
  • MI Configurator, Version 1.005F or later
  • Motorizer, Version 1.010L or later
  • MR Configurator2, Version 1.106L or later
  • MT Works2, Version 1.160S or later
  • MX Component, Version 4.20W or later
  • Network Interface Board CC IE Control utility, Version 1.30G or later
  • Network Interface Board CC IE Field Utility, Version 1.17T or later
  • Network Interface Board CC-Link Ver.2 Utility, Version 1.24A or later
  • Network Interface Board MNETH utility, Version 35M or later
  • PX Developer, Version 1.53F or later
  • RT ToolBox2, Version 3.73B or later
  • RT ToolBox3, Version 1.80J or later
  • Setting/monitoring tools for the C Controller module (SW4PVC-CCPU), Version 4.13P or later

For users who are using a product that has not released a fixed version or who cannot immediately update the product, Mitsubishi Electric recommends taking the following mitigation measures to minimize risk:

  • Install the fixed version GX Works2, GX Works3, or MELSOFT Navigator on the PC on which the product is installed. This is because these three products provide comprehensive countermeasures that give the same countermeasure effect to other products installed in the same folder (e.g. C:\Program files\MELSOFT).
  • Operate the products under an account that does not have administrator's privileges.
  • Install an antivirus software in computers using the products.
  • Restrict network exposure for all control system devices or systems to the minimum necessary and ensure they are not accessible from untrusted networks and hosts.
  • Locate control system networks and remote devices behind firewalls and isolate them from the network.
  • Use virtual private network (VPN) when remote access is required.

Additional information about the vulnerability or the Mitsubishi Electric compensating control is available by contacting a Mitsubishi Electric representative

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

CISA also provides a section for control systems security recommended practices on the ICS webpage on cisa.gov/ics 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 webpage on cisa.gov/ics 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 CISA for tracking and correlation against other incidents.

CISA also recommends users take the following measures to protect themselves from social engineering attacks: 

No known public exploits specifically target this vulnerability.

Contact Information

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

Email: CISAservicedesk@cisa.dhs.gov
Toll Free: 1-888-282-0870

For industrial control systems cybersecurity information:  https://us-cert.cisa.gov/ics 
or incident reporting:  https://us-cert.cisa.gov/report

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