CVE-2025-66597 - Vulnerability Details - OpenCVE

A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. This product supports weak cryptographic algorithms, potentially allowing an attacker to decrypt communications with the web server. The affected products and versions are as follows: FAST/TOOLS (Packages: RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) R9.01 to R10.04

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

No data.

No data.

No data.

No data.

References

Link	Providers
https://web-material3.yokogawa.com/1/39206/files/YSAR-26-0001-E.pdf

History

Mon, 09 Feb 2026 04:30:00 +0000

Type	Values Removed	Values Added
Description		A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. This product supports weak cryptographic algorithms, potentially allowing an attacker to decrypt communications with the web server. The affected products and versions are as follows: FAST/TOOLS (Packages: RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) R9.01 to R10.04
Weaknesses		CWE-327
References		https://web-material3.yokogawa.com/1/39206/files/YSAR-26-0001-E.pdf
Metrics		cvssV4_0 `{'score': 8.8, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N'}`

MITRE

Status: PUBLISHED

Assigner: YokogawaGroup

Published: 2026-02-09T03:31:24.991Z

Updated: 2026-02-09T03:31:24.991Z

Reserved: 2025-12-05T05:04:18.582Z

Link: CVE-2025-66597

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-02-09T05:16:24.070

Modified: 2026-02-09T05:16:24.070

Link: CVE-2025-66597

Redhat

No data.

OpenCVE Enrichment

No data.

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-66597", "assignerOrgId": "7168b535-132a-4efe-a076-338f829b2eb9", "state": "PUBLISHED", "assignerShortName": "YokogawaGroup", "dateReserved": "2025-12-05T05:04:18.582Z", "datePublished": "2026-02-09T03:31:24.991Z", "dateUpdated": "2026-02-09T03:31:24.991Z"}, "containers": {"cna": {"affected": [{"defaultStatus": "unknown", "product": "FAST/TOOLS", "vendor": "Yokogawa Electric Corporation", "versions": [{"lessThanOrEqual": "R10.04", "status": "affected", "version": "R9.01", "versionType": "custom"}]}], "datePublic": "2026-02-09T03:00:00.000Z", "descriptions": [{"lang": "en", "supportingMedia": [{"base64": false, "type": "text/html", "value": "<p>A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation.</p>\n\n<p>This product supports\nweak cryptographic algorithms, potentially allowing an attacker to decrypt\ncommunications with the web server.</p>\n\n<p>The\naffected products and versions are as follows: FAST/TOOLS (Packages: RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) R9.01 to\nR10.04</p>"}], "value": "A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation.\n\n\n\nThis product supports\nweak cryptographic algorithms, potentially allowing an attacker to decrypt\ncommunications with the web server.\n\n\n\nThe\naffected products and versions are as follows: FAST/TOOLS (Packages: RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) R9.01 to\nR10.04"}], "metrics": [{"cvssV4_0": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "baseScore": 8.8, "baseSeverity": "HIGH", "exploitMaturity": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-327", "description": "CWE-327 Use of a Broken or Risky Cryptographic Algorithm", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "7168b535-132a-4efe-a076-338f829b2eb9", "shortName": "YokogawaGroup", "dateUpdated": "2026-02-09T03:31:24.991Z"}, "references": [{"url": "https://web-material3.yokogawa.com/1/39206/files/YSAR-26-0001-E.pdf"}], "source": {"discovery": "UNKNOWN"}, "x_generator": {"engine": "Vulnogram 0.5.0"}}}}

{"cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation.\n\n\n\nThis product supports\nweak cryptographic algorithms, potentially allowing an attacker to decrypt\ncommunications with the web server.\n\n\n\nThe\naffected products and versions are as follows: FAST/TOOLS (Packages: RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) R9.01 to\nR10.04"}], "id": "CVE-2025-66597", "lastModified": "2026-02-09T05:16:24.070", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:L/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:X", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "7168b535-132a-4efe-a076-338f829b2eb9", "type": "Secondary"}]}, "published": "2026-02-09T05:16:24.070", "references": [{"source": "7168b535-132a-4efe-a076-338f829b2eb9", "url": "https://web-material3.yokogawa.com/1/39206/files/YSAR-26-0001-E.pdf"}], "sourceIdentifier": "7168b535-132a-4efe-a076-338f829b2eb9", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-327"}], "source": "7168b535-132a-4efe-a076-338f829b2eb9", "type": "Secondary"}]}