Hitachi JP1 is a widely used enterprise job-scheduling/operations product; a critical RCE-capable flaw in its Manager can disrupt corporate operations and warrants broad IT attention.
CVE-2026-76937
Heap buffer overflow in Hitachi JP1 Manager allowing remote code execution.
Is CVE-2026-76937 being exploited?
Not confirmed. CVE-2026-76937 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.
How severe is CVE-2026-76937?
CVE-2026-76937 is rated Critical with a CVSS score of 9.4. 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-2026-76937?
Yes. A fix has been recorded for CVE-2026-76937. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-76937 affect?
CVE-2026-76937 affects Hitachi JP1/Automatic Job Management System 3 - Manager versions 10-00 up to before 13-50-31. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-76937?
Apply vendor patch 13-50-31 or later; restrict Manager network access and monitor logs.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Heap-based buffer overflow can be exploited for remote code execution or service compromise of the JP1 Manager, leading to full system or operational disruption.
Immediate action required
- affected>= 10-00 and < 13-50-31
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.