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Vulnerability Details :

CVE-2025-66598

Summary
Assigner-YokogawaGroup
Assigner Org ID-7168b535-132a-4efe-a076-338f829b2eb9
Published At-09 Feb, 2026 | 03:26
Updated At-09 Feb, 2026 | 19:05
Rejected At-
Credits

A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. This product supports old SSL/TLS versions, 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

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:YokogawaGroup
Assigner Org ID:7168b535-132a-4efe-a076-338f829b2eb9
Published At:09 Feb, 2026 | 03:26
Updated At:09 Feb, 2026 | 19:05
Rejected At:
▼CVE Numbering Authority (CNA)

A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. This product supports old SSL/TLS versions, 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

Affected Products
Vendor
Yokogawa Electric Corporation
Product
FAST/TOOLS
Default Status
unknown
Versions
Affected
  • From R9.01 through R10.04 (custom)
Problem Types
TypeCWE IDDescription
CWECWE-327CWE-327 Use of a Broken or Risky Cryptographic Algorithm
Type: CWE
CWE ID: CWE-327
Description: CWE-327 Use of a Broken or Risky Cryptographic Algorithm
Metrics
VersionBase scoreBase severityVector
4.07.1HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Version: 4.0
Base score: 7.1
Base severity: HIGH
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:N/SI:N/SA:N
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
https://web-material3.yokogawa.com/1/39206/files/YSAR-26-0001-E.pdf
N/A
Hyperlink: https://web-material3.yokogawa.com/1/39206/files/YSAR-26-0001-E.pdf
Resource: N/A
▼Authorized Data Publishers (ADP)
CISA ADP Vulnrichment
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions
Configurations
Workarounds
Exploits
Credits
Timeline
EventDate
Replaced By
Rejected Reason
References
HyperlinkResource
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:7168b535-132a-4efe-a076-338f829b2eb9
Published At:09 Feb, 2026 | 05:16
Updated At:09 Feb, 2026 | 16:08

A vulnerability has been found in FAST/TOOLS provided by Yokogawa Electric Corporation. This product supports old SSL/TLS versions, 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

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Secondary4.07.1HIGH
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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
Type: Secondary
Version: 4.0
Base score: 7.1
Base severity: HIGH
Vector:
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/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
CPE Matches
Weaknesses
CWE IDTypeSource
CWE-327Secondary7168b535-132a-4efe-a076-338f829b2eb9
CWE ID: CWE-327
Type: Secondary
Source: 7168b535-132a-4efe-a076-338f829b2eb9
Evaluator Description
Evaluator Impact

Evaluator Solution

Vendor Statements
References
HyperlinkSourceResource
https://web-material3.yokogawa.com/1/39206/files/YSAR-26-0001-E.pdf7168b535-132a-4efe-a076-338f829b2eb9
N/A
Hyperlink: https://web-material3.yokogawa.com/1/39206/files/YSAR-26-0001-E.pdf
Source: 7168b535-132a-4efe-a076-338f829b2eb9
Resource: N/A

Change History

0
Information is not available yet

Similar CVEs

1Records found
CVE-2025-66597
Matching Score-6
Assigner-Yokogawa Group
ShareView Details
Matching Score-6
Assigner-Yokogawa Group
CVSS Score-8.8||HIGH
EPSS-0.03% / 7.89%
||
7 Day CHG~0.00%
Published-09 Feb, 2026 | 03:31
Updated-09 Feb, 2026 | 19:05
Rejected-Not Available
Known To Be Used In Ransomware Campaigns?-Not Available
KEV Added-Not Available
KEV Action Due Date-Not Available

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

Action-Not Available
Vendor-Yokogawa Electric Corporation
Product-FAST/TOOLS
CWE ID-CWE-327
Use of a Broken or Risky Cryptographic Algorithm
Details not found