CVE-2026-9854 PUBLISHED

Assigner: Hitachi Energy
Reserved: 28.05.2026 Published: 03.09.2026 Updated: 03.09.2026

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.

Metrics

CVSS 4.0

CVSS 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
CVSS Score: 8.5

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Local	Confidentiality	High	Confidentiality	None
Attack Complexity	Low	Integrity	High	Integrity	None
Attack Requirements	None	Availability	High	Availability	None
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	Hitachi Energy
Product	MicroSCADA SYS600
Versions	Default: unaffected affected from 10.0 to 10.7 (incl.)

References

https://publisher.hitachienergy.com/preview?DocumentID=8DBD000249&LanguageCode=en&DocumentPartId=&Action=Launch

Problem Types

CWE-303 Incorrect implementation of authentication algorithm CWE

Impacts

CAPEC-115 Authentication Bypass