CVE-2026-9853

highpriority · track · 31EPSS 0.001 · 3 %ileUS
grimoire priorityP2 · Scheduled
Exploitable?
—
no known exploitation
Likely / severe?
0.14% (3rd) EPSS
CVSS 7.8 · high
Is it mine?
3 products
Check your exposure
Who says so?
2 sources
cisa_csaf_ot · nvd

EPSS · scored 2026-10-22

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.

01

remediations

Vendor fix, mitigation, or workaround guidance, as published by each source.

A vendor fix is available.

  • FixedMicroSCADA X SYS600cisa_csaf_ot

    Update to version 10.8 and Follow mitigation strategy. Refer to MicroSCADA X SYS00 10.8 Installation and Administration Manual, Section 2.1.7.5 (Mitigation strategy is available for versions 10.3 onwards). Also refer to MicroSCADA X 10.8 Cybersecurity Deployment Guide

  • MitigationMicroSCADA X SYS600cisa_csaf_ot

    Follow general mitigation factors/workarounds

02

cvss

Technical severity, 0–10. One row per scoring source.

8.5
010

base score 0–10 · higher = more severe · hover a vector to decode⚠ sources disagree · medium–high · 5.9–8.5

v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hprimary · NVD / NIST USexploitability 1.8 · impact 5.9
v3.17.8highCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:Hsecondary · CISA US
v4.08.5highCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · cybersecurity@hitachienergy.com
v4.05.9mediumCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:Xsecondary · CVSS-BT (t0sche)
03

ssvc

A stakeholder decision — act, attend, or track — from exploitation and impact.

Exploitation: none · Automatable: no · Technical Impact: totalcoordinatorcisa_ssvcUS
04

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-303USprimaryCWE-303US
05

affected products (3)

Products and version ranges known to be affected.

06

advisories (1)

Vendor and ecosystem advisories describing this.

  • ICSA-26-293-04Hitachi Energy MicroSCADA X SYS600 Product2026-09-01icsa · cisa_csaf_otUS

    Hitachi Energy is aware of multiple vulnerabilities that affect MicroSCADA X SYS600 product versions listed in this document. These vulnerabilities can be exploited to carry out various attacks on the product. Please refer to the Recommended Immediate Actions for information about the mitigation/remediation.

07

sources

Which sources assert this record, and when.

cisa_csaf_otnvdNVDCVE.orgMITRE
published 2026-09-03modified 2026-09-09
09

references (1) nvd

External citations — patches, advisories, analysis.

scry

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