Is CVE-2026-76939 exploited in the wild?

No. Junglewise Threat Intelligence has no report of CVE-2026-76939 being exploited in the wild.

How severe is CVE-2026-76939?

Critical severity, with a CVSS score of 9.8, published 27 October 2026.

Which products and versions are affected?

Hitachi JP1/Automatic Job Management System 3 - Agent 11-00 through 13-50-04; affected versions: Windows and Linux 11-00-32, 11-10-34, 11-50-36 (Linux) / 11-50-36 (Windows), 12-00-37 (Windows) / 12-00-36 (Linux), 12-10-06 (Linux) / 12-10-06 (Windows), 12-50-51, 12-60-51, 13-00-06, 13-10-06, 13-50-04; Hitachi JP1/Automatic Job Management System 3 - Manager 11-00 through 13-50-04; affected versions: Windows and Linux 11-00-32, 11-10-34, 11-50-38, 12-00-39, 12-10-09, 12-50-52, 12-60-51, 13-00-09 (Windows) / 13-00-08 (Linux), 13-10-06, 13-50-04.

Is there a fix for CVE-2026-76939?

Yes: fixed in Manager and Agent: Windows and Linux 13-50-31, 12-60-53, 11-50-39. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

How is CVE-2026-76939 attacked?

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

Am I affected by CVE-2026-76939?

Check whether you run Hitachi JP1/Automatic Job Management System 3 - Agent or Hitachi JP1/Automatic Job Management System 3 - Manager 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-2026-76939: Hitachi JP1/Automatic Job Management System 3 heap-based buffer overflow

CVE-2026-76939 · Severity: critical · CVSS 9.8 · Published 2026-10-27

Hitachi's JP1/Automatic Job Management System 3 is an enterprise automation platform that manages scheduled jobs across distributed systems. A heap-based buffer overflow vulnerability allows a remote attacker with no authentication to crash the service or execute arbitrary code, potentially compromising job scheduling infrastructure and systems under management.

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

Quick answers

Is CVE-2026-76939 exploited in the wild?: No. Junglewise Threat Intelligence has no report of CVE-2026-76939 being exploited in the wild.
How severe is CVE-2026-76939?: Critical severity, with a CVSS score of 9.8, published 27 October 2026.
Which products and versions are affected?: Hitachi JP1/Automatic Job Management System 3 - Agent 11-00 through 13-50-04; affected versions: Windows and Linux 11-00-32, 11-10-34, 11-50-36 (Linux) / 11-50-36 (Windows), 12-00-37 (Windows) / 12-00-36 (Linux), 12-10-06 (Linux) / 12-10-06 (Windows), 12-50-51, 12-60-51, 13-00-06, 13-10-06, 13-50-04; Hitachi JP1/Automatic Job Management System 3 - Manager 11-00 through 13-50-04; affected versions: Windows and Linux 11-00-32, 11-10-34, 11-50-38, 12-00-39, 12-10-09, 12-50-52, 12-60-51, 13-00-09 (Windows) / 13-00-08 (Linux), 13-10-06, 13-50-04.
Is there a fix for CVE-2026-76939?: Yes: fixed in Manager and Agent: Windows and Linux 13-50-31, 12-60-53, 11-50-39. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2026-76939 attacked?: It is attacked over the network, in a hosted service.
Am I affected by CVE-2026-76939?: Check whether you run Hitachi JP1/Automatic Job Management System 3 - Agent or Hitachi JP1/Automatic Job Management System 3 - Manager 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: Manager and Agent: Windows and Linux 13-50-31, 12-60-53, 11-50-39

Technical details

A heap-based buffer overflow in JP1/Automatic Job Management System 3 allows remote code execution over the network without authentication or user interaction. The vulnerability affects both the Manager and Agent components across Windows and Linux platforms. Fixed versions: Manager and Agent 13-50-31, 12-60-53, and 11-50-39.

Affected products

Hitachi JP1/Automatic Job Management System 3 - Manager 11-00 through 13-50-04; affected versions: Windows and Linux 11-00-32, 11-10-34, 11-50-38, 12-00-39, 12-10-09, 12-50-52, 12-60-51, 13-00-09 (Windows) / 13-00-08 (Linux), 13-10-06, 13-50-04
Hitachi JP1/Automatic Job Management System 3 - Agent 11-00 through 13-50-04; affected versions: Windows and Linux 11-00-32, 11-10-34, 11-50-36 (Linux) / 11-50-36 (Windows), 12-00-37 (Windows) / 12-00-36 (Linux), 12-10-06 (Linux) / 12-10-06 (Windows), 12-50-51, 12-60-51, 13-00-06, 13-10-06, 13-50-04

Timeline

2026-10-27: disclosed

References

https://www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-143/index.html

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