Yokogawa Recorder Products

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1. EXECUTIVE SUMMARY

• CVSS v4 9.3
• ATTENTION: Exploitable remotely/low attack complexity
• Vendor: Yokogawa
• Equipment: GX10, GX20, GP10, GP20, GM Data Acquisition System, DX1000, DX2000, DX1000N, FX1000, μR10000, μR20000, MW100, DX1000T, DX2000T, CX1000, CX2000
• Vulnerability: Missing Authentication for Critical Function

2. RISK EVALUATION

Successful exploitation of this vulnerability could allow an attacker to manipulate information on the affected products.

3. TECHNICAL DETAILS

3.1 AFFECTED PRODUCTS

The following versions of Yokogawa recorder products are affected:

• GX10 / GX20 / GP10 / GP20 Paperless Recorders: Versions R5.04.01 and earlier
• GM Data Acquisition System: Versions R5.05.01 and earlier
• DX1000 / DX2000 / DX1000N Paperless Recorders: Versions R4.21 and earlier
• FX1000 Paperless Recorders: Versions R1.31 and earlier
• μR10000 / μR20000 Chart Recorders: Versions R1.51 and earlier
• MW100 Data Acquisition Units: All versions
• DX1000T / DX2000T Paperless Recorders: All versions
• CX1000 / CX2000 Paperless Recorders: All versions

3.2 VULNERABILITY OVERVIEW

3.2.1 MISSING AUTHENTICATION FOR CRITICAL FUNCTION CWE-306

Authentication is disabled by default on the affected products. When connected to a network with default settings, this could allow anyone to access all functions related to settings and operations. As a result, an attacker can illegally manipulate and configure important data such as measured values and settings.

CVE-2025-1863 has been assigned to this vulnerability. A CVSS v3.1 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).

A CVSS v4 score has also been calculated for CVE-2025-1863. A base score of 9.3 has been calculated; the CVSS vector string is (CVSS4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N).

3.3 BACKGROUND

• CRITICAL INFRASTRUCTURE SECTORS: Critical Manufacturing, Energy, Food and Agriculture
• COUNTRIES/AREAS DEPLOYED: Worldwide
• COMPANY HEADQUARTERS LOCATION: Japan

3.4 RESEARCHER

Souvik Kandar of MicroSec (microsec.io) reported this vulnerability to CISA.

4. MITIGATIONS

Yokogawa has provided the following countermeasures for this vulnerability:

• Yokogawa urges users to enable the authentication function when connecting the affected products to the network (login function).
• Be sure to change the password from the default setting after enabling the authentication function.

Yokogawa strongly recommends all users to establish and maintain a full security program. Security program components are patch updates, anti-virus, backup and recovery, zoning, hardening, whitelisting, firewall, etc. Yokogawa can assist in setting up and running the security program continuously. For considering the most effective risk mitigation plan, as a starting point, Yokogawa can perform a security risk assessment.

For more information, contact Yokogawa.

For more information and details on implementing these mitigations, users should see the Yokogawa advisory.

CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability, such as:

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

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.

5. UPDATE HISTORY

• April 17, 2025: Initial Publication

• Yokogawa