Is CVE-2026-86576 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-86576 being exploited in the wild.

How severe is CVE-2026-86576?

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 13-00-06, 13-10 to 13-10-06, 13-50 to 13-50-04; Hitachi JP1/Automatic Job Management System 3 - Agent Minimal Edition 13-00 to 13-00-06, 13-10 to 13-10-06, 13-50 to 13-50-02; Hitachi JP1/Automatic Job Management System 3 - Manager 13-00 to 13-00-09 (Windows), 13-00 to 13-00-08 (Linux), 13-10 to 13-10-06, 13-50 to 13-50-04; Hitachi JP1/Base 11-00 to 11-00-31, 11-10 to 11-10-32, 11-50 to 11-50-35, 12-00 to 12-00-34, 12-10 to 12-10-11, 12-50 to 12-50-53; and 1 more.

Is there a fix for CVE-2026-86576?

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, 13-10-31; 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-2026-86576 attacked?

It is attacked over the network, in a hosted service.

Am I affected by CVE-2026-86576?

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.

CVE-2026-86576: Hitachi JP1 heap-based buffer overflow

CVE-2026-86576 · Severity: critical · CVSS 9.4 · Published 2026-10-27

A heap-based buffer overflow vulnerability exists in Hitachi JP1, a suite of enterprise management and job automation products. An attacker can exploit this remotely without authentication or user interaction to gain full system compromise, including data theft, system modification, and potential denial of service on affected servers.

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-2026-86576 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-86576 being exploited in the wild.
How severe is CVE-2026-86576?: 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 13-00-06, 13-10 to 13-10-06, 13-50 to 13-50-04; Hitachi JP1/Automatic Job Management System 3 - Agent Minimal Edition 13-00 to 13-00-06, 13-10 to 13-10-06, 13-50 to 13-50-02; Hitachi JP1/Automatic Job Management System 3 - Manager 13-00 to 13-00-09 (Windows), 13-00 to 13-00-08 (Linux), 13-10 to 13-10-06, 13-50 to 13-50-04; Hitachi JP1/Base 11-00 to 11-00-31, 11-10 to 11-10-32, 11-50 to 11-50-35, 12-00 to 12-00-34, 12-10 to 12-10-11, 12-50 to 12-50-53; and 1 more.
Is there a fix for CVE-2026-86576?: 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, 13-10-31; 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-2026-86576 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-86576?: 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, 13-10-31; JP1/Automatic Job Management System 3 - Agent Minimal Edition 13-50-31; JP1/Base 12-50-54, 11-50-36

Technical details

This is a heap-based buffer overflow in JP1/Base, the underlying component used by multiple JP1 products including Integrated Management 3, Automatic Job Management System 3, and others. The vulnerability is remotely exploitable with no authentication required (CVSS vector: AV:N/AC:L/PR:N/UI:N), allowing an attacker to corrupt heap memory and execute arbitrary code or crash the service. Patches are available for all affected product lines.

Affected products

Hitachi JP1/Integrated Management 3 - Manager 13-00 to 13-50-01, 13-01 to 13-01-05, 13-10 to 13-10-05, 13-11 to 13-11-03
Hitachi JP1/Automatic Job Management System 3 - Manager 13-00 to 13-00-09 (Windows), 13-00 to 13-00-08 (Linux), 13-10 to 13-10-06, 13-50 to 13-50-04
Hitachi JP1/Automatic Job Management System 3 - Agent 13-00 to 13-00-06, 13-10 to 13-10-06, 13-50 to 13-50-04
Hitachi JP1/Automatic Job Management System 3 - Agent Minimal Edition 13-00 to 13-00-06, 13-10 to 13-10-06, 13-50 to 13-50-02
Hitachi JP1/Base 11-00 to 11-00-31, 11-10 to 11-10-32, 11-50 to 11-50-35, 12-00 to 12-00-34, 12-10 to 12-10-11, 12-50 to 12-50-53

Timeline

2026-10-27: disclosed

References

https://www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-155/index.html

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