CVE-2025-66596 - Vulnerability Details - OpenCVE

A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation.

This product does not
properly validate request headers. When an attacker inserts an invalid host
header, users could be redirected to malicious sites.

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 None

Vulnerable System Integrity Impact Low

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact Low

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.

Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

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 does not properly validate request headers. When an attacker inserts an invalid host header, users could be redirected to malicious sites. The affected products and versions are as follows: FAST/TOOLS (Packages: RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) R9.01 to R10.04
Weaknesses		CWE-601
References		https://web-material3.yokogawa.com/1/39206/files/YSAR-26-0001-E.pdf
Metrics		cvssV4_0 `{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N'}`

Projects

Sign in to view the affected projects.

MITRE

Status: PUBLISHED

Assigner: YokogawaGroup

Published: 2026-02-09T03:35:28.896Z

Updated: 2026-02-09T03:35:28.896Z

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

Link: CVE-2025-66596

Vulnrichment

No data.

NVD

Status : Received

Published: 2026-02-09T05:16:23.950

Modified: 2026-02-09T05:16:23.950

Link: CVE-2025-66596

Redhat

No data.

OpenCVE Enrichment

No data.

Weaknesses

CWE-601

{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2025-66596", "assignerOrgId": "7168b535-132a-4efe-a076-338f829b2eb9", "state": "PUBLISHED", "assignerShortName": "YokogawaGroup", "dateReserved": "2025-12-05T05:04:18.582Z", "datePublished": "2026-02-09T03:35:28.896Z", "dateUpdated": "2026-02-09T03:35:28.896Z"}, "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 does not\nproperly validate request headers. When an attacker inserts an invalid host\nheader, users could be redirected to malicious sites.</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 does not\nproperly validate request headers. When an attacker inserts an invalid host\nheader, users could be redirected to malicious sites.\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": 6.9, "baseSeverity": "MEDIUM", "exploitMaturity": "NOT_DEFINED", "privilegesRequired": "NONE", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/SA:N", "version": "4.0", "vulnAvailabilityImpact": "NONE", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "format": "CVSS", "scenarios": [{"lang": "en", "value": "GENERAL"}]}], "problemTypes": [{"descriptions": [{"cweId": "CWE-601", "description": "CWE-601 URL Redirection to Untrusted Site ('Open Redirect')", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"orgId": "7168b535-132a-4efe-a076-338f829b2eb9", "shortName": "YokogawaGroup", "dateUpdated": "2026-02-09T03:35:28.896Z"}, "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 does not\nproperly validate request headers. When an attacker inserts an invalid host\nheader, users could be redirected to malicious sites.\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-2025-66596", "lastModified": "2026-02-09T05:16:23.950", "metrics": {"cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 6.9, "baseSeverity": "MEDIUM", "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": "LOW", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:L/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": "NONE", "vulnIntegrityImpact": "LOW", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "7168b535-132a-4efe-a076-338f829b2eb9", "type": "Secondary"}]}, "published": "2026-02-09T05:16:23.950", "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-601"}], "source": "7168b535-132a-4efe-a076-338f829b2eb9", "type": "Secondary"}]}