# CVE-2026-76937: Hitachi JP1/Automatic Job Management System 3 heap overflow

Source: https://junglewise.ai/threats/cve-2026-76937-heap-based-buffer-overflow-vulnerability-in-jp1-automatic-job  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-27. Updated: 2026-10-27  
License: CC BY 4.0 with a link back

CVE-2026-76937 · Severity: critical · CVSS 9.4 · Published 2026-10-27

Hitachi JP1/Automatic Job Management System 3 is enterprise software that manages scheduled batch jobs across large IT environments. A heap-based buffer overflow in the Manager component allows a remote attacker to crash the system or execute arbitrary code without authentication, potentially disrupting business operations or compromising the integrity of job scheduling infrastructure.

Technologies: [Hitachi JP1/Automatic Job Management System 3 - Manager](https://junglewise.ai/threats/technologies/jp1-automatic-job-management-system-3-manager). Vendors: [Hitachi](https://junglewise.ai/threats/vendors/hitachi).

## Quick answers

**Is CVE-2026-76937 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-76937 being exploited in the wild.

**How severe is CVE-2026-76937?** 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 - Manager 10-00 to 13-50-04 (multiple branches; see advisory for full version ranges by platform).

**Is there a fix for CVE-2026-76937?** Yes: fixed in Windows and Linux: 13-50-31, 12-60-53, 11-50-39; AIX, HP-UX, Solaris: 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-2026-76937 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-76937?** Check whether you run 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 Windows and Linux: 13-50-31, 12-60-53, 11-50-39; AIX, HP-UX, Solaris: 12-60-53, 11-50-39

## Technical details

The vulnerability is a heap-based buffer overflow in JP1/Automatic Job Management System 3 Manager triggered via the network with no authentication or user interaction required. The overflow allows an unauthenticated attacker to cause denial of service or remote code execution with privileges of the Manager process.

## Affected products

- Hitachi JP1/Automatic Job Management System 3 - Manager 10-00 to 13-50-04 (multiple branches; see advisory for full version ranges by platform)

## Timeline

- 2026-10-27: advisory: Vulnerability disclosure and advisory published

## References

- [https://www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-142/index.html](https://www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-142/index.html)

## Related threats

- [Hitachi JP1 out-of-bounds write vulnerability](https://junglewise.ai/threats/cve-2026-86577-out-of-bounds-write-vulnerability-in-jp1-products-this-issue)
- [Hitachi JP1 heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-86576-heap-based-buffer-overflow-vulnerability-in-jp1-products-this)
- [Hitachi JP1 stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-86575-stack-based-buffer-overflow-vulnerability-in-jp1-products-this)
- [Hitachi JP1/Automatic Job Management System 3 heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-76939-heap-based-buffer-overflow-vulnerability-in-jp1-automatic-job)
- [Hitachi JP1/Automatic Job Management System 3 authentication bypass](https://junglewise.ai/threats/cve-2026-76938-authentication-bypass-vulnerability-in-jp1-automatic-job)