Mitsubishi Electric GX Works2

View CSAF

1. EXECUTIVE SUMMARY CVSS v4 6.8 ATTENTION: Low attack complexity Vendor: Mitsubishi Electric Equipment: GX Works2 Vulnerability: Cleartext Storage of Sensitive Information
2. RISK EVALUATION Successful exploitation of this vulnerability could open project files protected by user authentication using disclosed credential information, and obtain or modify project information.
3. TECHNICAL DETAILS 3.1 AFFECTED PRODUCTS The following versions of GX Works2 are affected: GX Works2: All versions 3.2 VULNERABILITY OVERVIEW 3.2.1 CLEARTEXT STORAGE OF SENSITIVE INFORMATION CWE-312 An attacker could disclose credential information stored in plaintext from project files. As a result, the attacker may be able to open project files protected by user authentication using disclosed credential information, and obtain or modify project information. CVE-2025-3784 has been assigned to this vulnerability. A CVSS v3.1 base score of 5.5 has been calculated; the CVSS vector string is (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N). A CVSS v4 score has also been calculated for CVE-2025-3784. A base score of 6.8 has been calculated; the CVSS vector string is (AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N). 3.3 BACKGROUND CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing COUNTRIES/AREAS DEPLOYED: Worldwide COMPANY HEADQUARTERS LOCATION: Japan 3.4 RESEARCHER Jiho Shin of Sungkyunkwan University reported this vulnerability to Mitsubishi Electric. Mitsubishi Electric reported this vulnerability to CISA.
4. MITIGATIONS The fixed version for this vulnerability is currently under development by Mitsubishi Electric. Until the fixed version is released, please implement the following mitigations: Use the PCs with the affected product installed in the LAN and block remote logins from untrusted networks, hosts, or users. Block unauthorized access by using a firewall or a virtual private network (VPN), etc., and allow remote logins only for trusted users when connecting the PCs with the affected product installed to the Internet. Restrict physical access to the PCs with the affected product installed, as well as to PCs and network devices that can communicate with those PCs. Install an antivirus software on the PCs running the affected product. Encrypt project files when sending or receiving them over the Internet. See Mitsubishi Electric’s security bulletin for information on the availability of the security updates. 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 CISA products detailing cyber defense best practices are available for reading and download, including Improving Industrial Control Systems Cybersecurity with Defense-in-Depth Strategies. CISA encourages organizations to implement recommended cybersecurity strategies for proactive defense of ICS assets. Additional mitigation guidance and recommended practices are publicly available on the ICS webpage at cisa.gov/ics in the technical information paper, ICS-TIP-12-146-01B–Targeted Cyber Intrusion Detection and Mitigation Strategies. Organizations observing suspected malicious activity should follow established internal procedures and report findings to CISA for tracking and correlation against other incidents. No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. This vulnerability is not exploitable remotely.
5. UPDATE HISTORY December 4, 2025: Initial Republication of Mitsubishi Electric Advisory Mitsubishi Electric 2025-016