CVE-2026-9853
SYS600 allows OS-authenticated users to access/modify app objects without SYS600 auth
Is CVE-2026-9853 being exploited?
Not confirmed. CVE-2026-9853 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.13% probability of exploitation in the next 30 days.
How severe is CVE-2026-9853?
CVE-2026-9853 is rated High. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-9853?
Yes. A fix has been recorded for CVE-2026-9853. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-9853 affect?
CVE-2026-9853 affects Hitachi Energy SYS600 servers, SYS600 application objects, Hosts running SYS600. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-9853?
Restrict OS user access, isolate SYS600 hosts, and apply vendor patch when released
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Local OS-authenticated users can read and modify SYS600 application objects, enabling data theft, tampering, and privilege escalation.
Immediate action required
- affected>= 10.0 and <= 10.8
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.