CVE-2025-66603
Yokogawa Fast\/Tools r9.01 – r10.04
Raw vector
CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:XSummary
CVE-2025-66603 is a low-severity Improperly Implemented Security Check for Standard (CWE-358) vulnerability in Yokogawa Fast\/Tools. Its CVSS base score is 2.1 (Low).
Operationally, exploitation aligns with the MITRE ATT&CK technique Downgrade Attack (T1689); ranked at the 18th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
Deeper analysis AI-assisted summary
Synthesised by an AI model from the NVD description and linked references — a reading aid, not an authoritative source.
CVE-2025-66603 is a vulnerability in FAST/TOOLS software provided by Yokogawa Electric Corporation, where the web server accepts the OPTIONS HTTP method. An attacker could potentially use this information to carry out other attacks. The vulnerability affects FAST/TOOLS packages RVSVRN, UNSVRN, HMIWEB, FTEES, and HMIMOB in versions R9.01 to R10.04 and is associated with CWE-358. It has a CVSS v3.1 base score of 9.8 (AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).
A remote, unauthenticated attacker with network access to the affected web server can exploit this vulnerability with low complexity and no user interaction. By sending an OPTIONS request, the attacker can obtain information about the server, such as supported HTTP methods, which could facilitate further attacks leading to high impacts on confidentiality, integrity, and availability.
Yokogawa has issued security advisory YSAR-26-0001-E, available at https://web-material3.yokogawa.com/1/39206/files/YSAR-26-0001-E.pdf, which provides details on the vulnerability and associated mitigation measures.
EU & UK References
- 🇪🇺 ENISA EUVD: EUVD-2025-207170
Vulnerability Data
A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. The web server accepts the OPTIONS method. An attacker could potentially use this information to carry out other attacks. The affected products and versions are as follows: FAST/TOOLS…
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(Packages: RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) R9.01 to R10.04
- CWE(s)
Related Threats
MITRE ATT&CK Enterprise Techniques
CVEs Like This One
Affected Assets
Mitigating Controls
Control response
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V17.2.8
Likely Mitigating Controls AI
Per-CVE control mapping for this CVE has not run yet; the list below is derived from the weakness types (CWEs) cited in the NVD entry.
Assessments identify and document improperly implemented security checks, allowing fixes that reduce exploitation of flawed checks.
Mitigating Controls (NIST CSF 2.0) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→CSF cross-walk (authority under review) — links open the control.
Secure SDLC practices directly require correct implementation of standardized security checks and algorithms.
Mitigating Controls (ISO/IEC 27001:2022 Annex A) AI
Derived directly from the weakness types (CWEs) cited in the NVD entry via our AI-authored CWE→ISO cross-walk (authority under review) — links open the control.
Security testing in development and acceptance validates that required security checks function as specified.
Use of cryptography control depends on correct implementation of standardized cryptographic checks.
Secure development life cycle mandates verification that security checks required by standards are correctly implemented.
Application security requirements explicitly call for correct implementation of standardized security mechanisms.
Secure system architecture and engineering principles require faithful realization of protocol-level security checks.
Secure coding practices directly address correct implementation of security-relevant checks in standardized algorithms.