CVE-2026-86577: Hitachi JP1 out-of-bounds write vulnerability

CVE-2026-86577 · Severity: critical · CVSS 9.4 · Published 2026-10-27

Hitachi JP1 is a systems management platform that handles automated job scheduling and integrated monitoring across enterprise infrastructure. An out-of-bounds write vulnerability allows remote attackers to corrupt memory, potentially leading to system compromise, data theft, or denial of service. The flaw requires no authentication and can be triggered over the network.

Technologies: Hitachi JP1/Automatic Job Management System 3 - Agent, Hitachi JP1/Automatic Job Management System 3 - Agent Minimal Edition, Hitachi JP1/Automatic Job Management System 3 - Manager, Hitachi JP1/Base, Hitachi JP1/Integrated Management 3 - Manager. Vendors: Hitachi.

Quick answers

Is CVE-2026-86577 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-86577 being exploited in the wild.
How severe is CVE-2026-86577?
Critical severity, with a CVSS score of 9.4, published 27 October 2026.
Which products and versions are affected?
Hitachi JP1/Automatic Job Management System 3 - Agent 13-00 to 13-50-30; Hitachi JP1/Automatic Job Management System 3 - Agent Minimal Edition 13-00 to 13-50-30; Hitachi JP1/Automatic Job Management System 3 - Manager 13-00 to 13-50-30; Hitachi JP1/Base 11-00 to 12-50-53; and 1 more.
Is there a fix for CVE-2026-86577?
Yes: fixed in JP1/Integrated Management 3 - Manager: 13-50-31; JP1/Automatic Job Management System 3 - Manager: 13-50-31; JP1/Automatic Job Management System 3 - Agent: 13-50-31 (Windows/Linux), 13-10-31 (AIX); JP1/Automatic Job Management System 3 - Agent Minimal Edition: 13-50-31; JP1/Base: 12-50-54, 11-50-36. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-86577 attacked?
It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-86577?
Check whether you run Hitachi JP1/Automatic Job Management System 3 - Agent, Hitachi JP1/Automatic Job Management System 3 - Agent Minimal Edition, Hitachi JP1/Automatic Job Management System 3 - Manager or one of the others listed at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

How to fix

  • Fixed in: JP1/Integrated Management 3 - Manager: 13-50-31; JP1/Automatic Job Management System 3 - Manager: 13-50-31; JP1/Automatic Job Management System 3 - Agent: 13-50-31 (Windows/Linux), 13-10-31 (AIX); JP1/Automatic Job Management System 3 - Agent Minimal Edition: 13-50-31; JP1/Base: 12-50-54, 11-50-36

Technical details

An out-of-bounds write vulnerability in JP1/Base and related JP1 products allows remote code execution or denial of service via memory corruption. The vulnerability has a CVSS score of 9.4 with network-based attack vector and no authentication required. Fixes are available across all affected product lines.

Affected products

  • Hitachi JP1/Integrated Management 3 - Manager 13-00 to 13-50-30
  • Hitachi JP1/Automatic Job Management System 3 - Manager 13-00 to 13-50-30
  • Hitachi JP1/Automatic Job Management System 3 - Agent 13-00 to 13-50-30
  • Hitachi JP1/Automatic Job Management System 3 - Agent Minimal Edition 13-00 to 13-50-30
  • Hitachi JP1/Base 11-00 to 12-50-53

Timeline

  • 2026-10-27: disclosed

References

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