---
id: CVE-2026-9854
title: >-
  A vulnerability exists in SYS600 RBAC mechanism where users having access to
  the engineering tools could elevate their privileges to administrator level on
  the underlying Windows host, granting themselves full control over the host
  machine.
summary: >-
  A vulnerability exists in SYS600 RBAC mechanism where users having access to
  the engineering tools could elevate their privileges to administrator level on
  the underlying Windows host, granting themselves full control over the host
  machine.
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-303
vendor: hitachienergy
product: microscada_x_sys600
affected:
  - 'microscada_x_sys600 >= 10.0, <= 10.7'
published: '2026-09-03'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T19:46:52.150'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-9854'
references:
  - url: >-
      https://publisher.hitachienergy.com/preview?DocumentID=8DBD000249&LanguageCode=en&DocumentPartId=&Action=Launch
    label: cybersecurity@hitachienergy.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-03T12:48:27.499967Z'
scores:
  nvd: 7.8
  cna: 8.5
ingestedAt: '2026-09-14T08:58:10.191Z'
epss: 0.00144
epssPercentile: 0.0305
---

## Overview

A vulnerability exists in SYS600 RBAC mechanism where users having access to the engineering tools could elevate their privileges to administrator level on the underlying Windows host, granting themselves full control over the host machine.

## Affected

- `microscada_x_sys600 >= 10.0, <= 10.7`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.