Summary
Successful exploitation of these vulnerabilities could allow an attacker to redirected users to malicious sites, decrypt communications, perform a man-in-the-middle (MITM) attack, execute malicious scripts, steal files, and perform other various attacks.
The following versions of Yokogawa FAST/TOOLS are affected:
- FAST/TOOLS >=R9.01|<=R10.04 (CVE-2025-66594, CVE-2025-66595, CVE-2025-66597, CVE-2025-66598, CVE-2025-66599, CVE-2025-66600, CVE-2025-66601, CVE-2025-66602, CVE-2025-66603, CVE-2025-66604, CVE-2025-66605, CVE-2025-66606, CVE-2025-66607, CVE-2025-66608)
| CVSS | Vendor | Equipment | Vulnerabilities |
|---|---|---|---|
| v3 8.2 | Yokogawa | Yokogawa FAST/TOOLS | Generation of Error Message Containing Sensitive Information, Cross-Site Request Forgery (CSRF), Use of a Broken or Risky Cryptographic Algorithm, Exposure of Sensitive System Information to an Unauthorized Control Sphere, Improperly Implemented Security Check for Standard, Reliance on IP Address for Authentication, Cleartext Transmission of Sensitive Information, Exposure of Private Personal Information to an Unauthorized Actor, Improper Neutralization of Invalid Characters in Identifiers in Web Pages, Path Traversal: ‘\..\filename’ |
Background
- Critical Infrastructure Sectors: Critical Manufacturing, Energy, Food and Agriculture
- Countries/Areas Deployed: Worldwide
- Company Headquarters Location: Japan
Vulnerabilities
CVE-2025-66595
This product is vulnerable to cross-site request forgery (CSRF). When a user accesses a link crafted by an attacker, the user’s account could be compromised.
Affected Products
Yokogawa FAST/TOOLS
Vendor:
Yokogawa
Product Version:
Yokogawa FAST/TOOLS: >=R9.01|<=R10.04
Product Status:
known_affected
Relevant CWE: CWE-352 Cross-Site Request Forgery (CSRF)
Metrics
CVE-2025-66602
The web server accepts access by IP address. When a worm that randomly searches for IP addresses intrudes into the network, it could potentially be attacked by the worm.
Affected Products
Yokogawa FAST/TOOLS
Vendor:
Yokogawa
Product Version:
Yokogawa FAST/TOOLS: >=R9.01|<=R10.04
Product Status:
known_affected
Relevant CWE: CWE-291 Reliance on IP Address for Authentication
Metrics
CVE-2025-66608
This product fails to adequately validate URLs. An attacker could send maliciously crafted requests to gain unauthorized access to files on the web server.
Affected Products
Yokogawa FAST/TOOLS
Vendor:
Yokogawa
Product Version:
Yokogawa FAST/TOOLS: >=R9.01|<=R10.04
Product Status:
known_affected
Relevant CWE: CWE-29 Path Traversal: ‘\..\filename’
Metrics
Acknowledgments
- Yokogawa reported these vulnerabilities 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 these vulnerabilities, 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.
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 these vulnerabilities has been reported to CISA at this time.
Revision History
- Initial Release Date: 2026-02-10
| Date | Revision | Summary |
|---|---|---|
| 2026-02-10 | 1 | Initial Republication of YSAR-26-0001-E |