Summary
Successful exploitation of this vulnerability could allow an attacker to login as the PROG user and modify permissions.
The following versions of Yokogawa CENTUM VP are affected:
- CENTUM VP >=R5.01.00|
- CENTUM VP >=R6.01.00|
- CENTUM VP vR7.01.00 (CVE-2025-7741)
| CVSS | Vendor | Equipment | Vulnerabilities |
|---|---|---|---|
| v3 4 | Yokogawa | Yokogawa CENTUM VP | Use of Hard-coded Password |
Background
- Critical Infrastructure Sectors: Critical Manufacturing, Energy, Food and Agriculture
- Countries/Areas Deployed: Worldwide
- Company Headquarters Location: Japan
Vulnerabilities
CVE-2025-7741
Affected products contain a hardcoded password for the user account (PROG) used for CENTUM Authentication Mode within the system. Under the following conditions, there is a risk that an attacker could log in as the PROG user. The default permission for the PROG users is S1 permission (equivalent to OFFUSER). Therefore, for properly permission-controlled targets of operation and monitoring, even if an attacker logs in as the PROG user, the risk of critical operations or configuration changes being performed is considered low. If the PROG user’s permissions have been changed for any reason, there is a risk that operations or configuration changes may be performed under the modified permissions. Additionally, exploiting this vulnerability requires an attacker to already have access to the HIS screen controls.
Affected Products
Yokogawa CENTUM VP
Yokogawa
Yokogawa CENTUM VP: >=R5.01.00|<R5.04.20, Yokogawa CENTUM VP: >=R6.01.00|<R6.12.00, Yokogawa CENTUM VP: vR7.01.00
known_affected
Remediations
Mitigation
Yokogawa recommends users applying the following mitigations to affected versions:
Vendor fix
CENTUM VP R5.01.00 to R5.04.20: Change the user authentication mode to Windows Authentication Mode.
Vendor fix
CENTUM VP R6.01.00 to R6.12.00: Change the user authentication mode to Windows Authentication Mode.
Vendor fix
CENTUM VP R7.01.00: Apply patch software R7.01.10.
Mitigation
NOTE:Changing to Windows Authentication Mode requires engineering work. If users wish to make this change, please contact Yokogawa directly https://contact.yokogawa.com/cs/gw?c-id=000498.
https://contact.yokogawa.com/cs/gw?c-id=000498
Mitigation
For more information and details on implementing these mitigations, users should see the Yokogawa advisory YSAR-26-0003 at https://web-material3.yokogawa.com/1/39281/files/YSAR-26-0003-E.pdf
https://web-material3.yokogawa.com/1/39281/files/YSAR-26-0003-E.pdf
Relevant CWE: CWE-259 Use of Hard-coded Password
Metrics
| CVSS Version | Base Score | Base Severity | Vector String |
|---|---|---|---|
| 3.1 | 4 | MEDIUM | CVSS:3.1/AV:L/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N |
Acknowledgments
- Yokogawa reported this vulnerability to CISA
Legal Notice and Terms of Use
This product is provided subject to this Notification (https://www.cisa.gov/notification) and this Privacy & Use policy (https://www.cisa.gov/privacy-policy).
Recommended Practices
CISA recommends users take defensive measures to minimize the risk of exploitation of this vulnerability.
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.
CISA also recommends users take the following measures to protect themselves from social engineering attacks:
Do not click web links or open attachments in unsolicited email messages.
Refer to Recognizing and Avoiding Email Scams for more information on avoiding email scams.
Refer to Avoiding Social Engineering and Phishing Attacks for more information on social engineering attacks.
No known public exploitation specifically targeting this vulnerability has been reported to CISA at this time. This vulnerability is not exploitable remotely. This vulnerability has a high attack complexity.
Revision History
- Initial Release Date: 2026-04-02
| Date | Revision | Summary |
|---|---|---|
| 2026-04-02 | 1 | Initial Republication of YSAR-26-0003 |
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