Vulnerability · CVE-2026-9853
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 objec…
Published Sep 3, 2026 · catalog updated Sep 3, 2026 · Hitachi Energy MicroSCADA SYS600
Last checked Oct 26, 2026. A connected source was read within the last 7 days.
Check if you run it
No confirmed exploitation is on record for CVE-2026-9853. EPSS is 0.14%. Act only if a listed version of Hitachi Energy MicroSCADA SYS600 is installed.
Gaps on this record
- No version range is stored. A customer cannot check an installed version against this record.
- No vendor fix or required action is stored. Compare the linked advisory before you change production.
Same product and reporting
- CVE-2026-9854 · High
- CVE-2026-9852 · Medium
- Severity
- High8.5
- Known exploitation
- Not in CISA/VulnCheck KEV
- EPSS
- 0.14%
- Remediation
- Not established
- Affected products
- vendor Hitachi Energy MicroSCADA SYS600
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.
Are you affected?
Enter the version you run. The result uses only the ranges stored on this record.
The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.
- vendor Hitachi Energy MicroSCADA SYS600version unspecified
How to fix CVE-2026-9853
No stored fix
No vendor fix text is stored. Use the linked advisory before you change production.
Version check
No version range is stored, so an installed version cannot be checked on this page.
Advisory
Open the cisa_advisories record and follow its fix.
Official advisories
What to do
Three questions, each answered from this record only. Confirm the vendor advisory before you patch.
Should you patch?
No confirmed exploitation is on record for CVE-2026-9853. EPSS is 0.14%. Act only if a listed version of Hitachi Energy MicroSCADA SYS600 is installed.
Which versions are affected?
Affected version ranges are not on this record. Compare the installed version with the linked vendor advisory before you change production.
What should an analyst verify?
CWE-303. EPSS 0.14%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.
Code
The project this record applies to. Exploit listings stay in References.
No public source repository is identified for this product.
Timeline
Detection, updates, and resolution for this record.
Sep 3, 2026 · CVE.org
Updated
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.
Oct 20, 2026 · CISA ICS Advisories
Detected
CVE-2026-9853 is listed by Hitachi Energy MicroSCADA X SYS600 Product.
Sources
- CISA Cybersecurity AdvisoriesGovernment advisoryCVE-2026-9853
View CSAF Summary 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 fo
cisa.gov - CISA ICS AdvisoriesGovernment advisoryCVE-2026-9853
View CSAF Summary 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 fo
cisa.gov - CVE.orgVulnerability recordCVE-2026-9853
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 v
cve.org - FIRST EPSSExploitation probabilityCVE-2026-9853
30-day exploitation probability 0.14%
first.org
References
Freshness
Last verified in this catalog Oct 26, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.
- CISA Cybersecurity AdvisoriesOct 24, 2026
- CVE.orgOct 23, 2026
- FIRST EPSSOct 23, 2026
- CISA ICS AdvisoriesOct 23, 2026