# CVE-2026-76936: Hitachi JP1/Automatic Job Management System 3 stack-based buffer overflow

Source: https://junglewise.ai/threats/cve-2026-76936-stack-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-2026-76936 · Severity: critical · CVSS 9.4 · Published 2026-10-27

JP1/Automatic Job Management System 3 is a job scheduling and management software used by enterprises to automate business processes. A stack-based buffer overflow vulnerability allows remote attackers without credentials to execute arbitrary code on the system with no authentication required, gaining full system compromise including data theft and service disruption.

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-2026-76936 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-76936 being exploited in the wild.

**How severe is CVE-2026-76936?** 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 (Windows); 10-00 to 13-50-04 (Linux); 10-00 to 11-00-32, 10-50 to 10-50-16, 10-10 to 10-10-18, 12-60 to 12-60-52, 12-50 to 12-50-52, 12-10 to 12-10-09, 12-00 to 12-00-39, 11-50 to 11-50-38, 11-10 to 11-10-32 (AIX, HP-UX); 10-00 to 11-00-32, 10-50 to 10-50-16, 10-10 to 10-10-18, 12-60 to 12-60-51, 12-50 to 12-50-52, 12-10 to 12-10-09, 12-00 to 12-00-39, 11-50 to 11-50-38, 11-10 to 11-10-32 (Solaris).

**Is there a fix for CVE-2026-76936?** Yes: fixed in JP1/Automatic Job Management System 3 - Manager: 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-2026-76936 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-76936?** 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 JP1/Automatic Job Management System 3 - Manager: 13-50-31, 12-60-53, 11-50-39

## Technical details

Stack-based buffer overflow in JP1/Automatic Job Management System 3 - Manager allows unauthenticated remote code execution over the network with no user interaction required. The vulnerability affects the Manager component across Windows, Linux, AIX, HP-UX, and Solaris platforms in versions 10-00 through 13-50-04. Exploiting this overflow enables arbitrary code execution with privileges of the affected service process.

## Affected products

- Hitachi JP1/Automatic Job Management System 3 - Manager 10-00 to 13-50-04 (Windows); 10-00 to 13-50-04 (Linux); 10-00 to 11-00-32, 10-50 to 10-50-16, 10-10 to 10-10-18, 12-60 to 12-60-52, 12-50 to 12-50-52, 12-10 to 12-10-09, 12-00 to 12-00-39, 11-50 to 11-50-38, 11-10 to 11-10-32 (AIX, HP-UX); 10-00 to 11-00-32, 10-50 to 10-50-16, 10-10 to 10-10-18, 12-60 to 12-60-51, 12-50 to 12-50-52, 12-10 to 12-10-09, 12-00 to 12-00-39, 11-50 to 11-50-38, 11-10 to 11-10-32 (Solaris)

## Timeline

- 2026-10-27: disclosed

## 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)