Successful exploitation of this vulnerability could allow an attacker to manipulate information on the affected products.
The following versions of Yokogawa recorder products are affected:
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).
Souvik Kandar of MicroSec (microsec.io) reported this vulnerability to CISA.
Yokogawa has provided the following countermeasures for this vulnerability:
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:
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.