CVE-2025-66597 Weak cryptography in FAST/TOOLS
Weak cryptographic algorithms in Yokogawa FAST/TOOLS allow attackers to decrypt communications with the web server.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-66597?
CVE-2025-66597 is a high-severity vulnerability in Yokogawa Electric Corporation FAST/TOOLS, published on 9 Feb 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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
Weakness: CWE-327
Which versions are affected by CVE-2025-66597?
It affects 1 product.
Products include Yokogawa Fast\/Tools.
How do I fix CVE-2025-66597?
No fix has been published for CVE-2025-66597 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-66597 being exploited?
There is no known exploitation of CVE-2025-66597 in the wild and no public exploit code.
Other vulnerabilities in Yokogawa Electric Corporation FAST/TOOLS
Sources
Also known as GHSA-7mvw-jq5j-mjx4.