CVE-2026-9853

OS‑Level Access Allows Unauthorized Modification of SYS600 Objects

Published Sep 3, 2026 CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed
Description
A vulnerability exists in SYS600 which allows any user authenticated to the operating system of the server hosting the application to read and modify application objects without being authenticated to the SYS600 system itself.

Only the SYS600 system users should be permitted to view and modify application objects.

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
Title OS‑Level Access Allows Unauthorized Modification of SYS600 Objects
Type Values Removed Values Added
First Time appeared Hitachienergy
Hitachienergy microscada Sys600
Vendors & Products Hitachienergy
Hitachienergy microscada Sys600
Type Values Removed Values Added
Description A vulnerability exists in SYS600 which allows any user authenticated to the operating system of the server hosting the application to read and modify application objects without being authenticated to the SYS600 system itself. Only the SYS600 system users should be permitted to view and modify application objects.
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, 12:49 PM
Reserved
May 28, 2026, 3:04 PM
Status
Analyzed
Published
Sep 3, 2026, 1:06 PM
Modified
Sep 9, 2026, 7:36 PM