CVE-2025-66596
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Host Header Injection in Yokogawa FAST/TOOLS Enables Phishing Redirects

Publication date: 2026-02-09

Last updated on: 2026-03-06

Assigner: YokogawaGroup

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
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Meta Information
Published
2026-02-09
Last Modified
2026-03-06
Generated
2026-06-16
AI Q&A
2026-02-09
EPSS Evaluated
2026-06-14
NVD
CVE-2025-66596
EUVD
EUVD-2025-207177
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
yokogawa fast/tools From r9.01 (inc) to r10.04 (inc)
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Exploitability
CWE
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KEV
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CWE ID Description
CWE-601 The web application accepts a user-controlled input that specifies a link to an external site, and uses that link in a redirect.
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Executive Summary

This vulnerability exists in the FAST/TOOLS product by Yokogawa Electric Corporation. The issue is that the product does not properly validate request headers. Specifically, when an attacker inserts an invalid host header, it can cause users to be redirected to malicious websites.

Impact Analysis

The impact of this vulnerability is that users of the affected FAST/TOOLS versions could be redirected to malicious sites if an attacker exploits the invalid host header validation. This could lead to phishing attacks, exposure to malware, or other malicious activities targeting users.

Compliance Impact

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