CVE-2026-11833 Information disclosure in CI Server
An attacker can retrieve sensitive CI Server configuration information from the web server, potentially aiding further attacks on Yokogawa industrial systems.
- 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-2026-11833?
CVE-2026-11833 is a high-severity vulnerability in Yokogawa Electric Corporation CI Server, published on 23 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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
Weakness: CWE-319
Which versions are affected by CVE-2026-11833?
How do I fix CVE-2026-11833?
No fix has been published for CVE-2026-11833 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-11833 being exploited?
There is no known exploitation of CVE-2026-11833 in the wild and no public exploit code.
Sources
Also known as GHSA-4852-997v-4274.