CVE-2026-9854

Privilege Escalation via RBAC Bypass in Hitachi Energy MicroSCADA SYS600

Published Sep 3, 2026 CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed
Description
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.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Hitachienergy microscada X Sys600
CPEs cpe:2.3:a:hitachienergy:microscada_x_sys600:*:*:*:*:*:*:*:*
Vendors & Products Hitachienergy microscada X Sys600
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Hitachienergy
Hitachienergy microscada Sys600
Vendors & Products Hitachienergy
Hitachienergy microscada Sys600
Type Values Removed Values Added
Title Privilege Escalation via RBAC Bypass in Hitachi Energy MicroSCADA SYS600
Type Values Removed Values Added
Description 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.
Weaknesses CWE-303
References
Metrics cvssV4_0

{'score': 8.5, 'vector': 'CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Hitachi Energy
Published
Updated
Sep 3, 2026, 12:48 PM
Reserved
May 28, 2026, 3:04 PM
Status
Analyzed
Published
Sep 3, 2026, 1:06 PM
Modified
Sep 9, 2026, 7:46 PM