# CVE-2026-76933: Hitachi JP1/Automatic Job Management System 3 heap-based buffer overflow

Source: https://junglewise.ai/threats/cve-2026-76933-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-2026-76933 · Severity: critical · CVSS 9.4 · Published 2026-10-27

A heap-based buffer overflow in Hitachi's JP1/Automatic Job Management System 3, which manages automated job scheduling across enterprise networks, allows remote unauthenticated attackers to execute arbitrary code or crash the system. The vulnerability affects both Manager and Agent components across multiple platforms, potentially compromising the integrity of scheduled operations and enabling lateral movement within a network.

Technologies: [Hitachi JP1/Automatic Job Management System 3 - Agent](https://junglewise.ai/threats/technologies/jp1-automatic-job-management-system-3-agent), [Hitachi JP1/Automatic Job Management System 3 - Agent Minimal Edition](https://junglewise.ai/threats/technologies/jp1-automatic-job-management-system-3-agent-minimal-edition), [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-2026-76933 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-76933 being exploited in the wild.

**How severe is CVE-2026-76933?** 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 10-00 to 13-50-04 (Windows, Linux, AIX, HP-UX, Solaris); Hitachi JP1/Automatic Job Management System 3 - Agent Minimal Edition 11-50 to 13-50-02 (Windows, Linux); Hitachi JP1/Automatic Job Management System 3 - Manager 10-00 to 13-50-04 (Windows, Linux, AIX, HP-UX, Solaris).

**Is there a fix for CVE-2026-76933?** Yes: fixed in JP1/Automatic Job Management System 3 - Manager: 13-50-31, 12-60-53, 11-50-39 (Windows, Linux); 12-60-53, 11-50-39 (AIX, HP-UX, Solaris); JP1/Automatic Job Management System 3 - Agent: 13-50-31, 12-60-53, 11-50-39 (Windows, Linux); 13-10-31, 12-60-53, 11-50-39 (AIX); 12-60-53, 11-50-39 (HP-UX, Solaris); JP1/Automatic Job Management System 3 - Agent Minimal Edition: 13-50-31, 12-60-53, 11-50-39 (Windows, Linux). Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-76933 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-76933?** Check whether you run Hitachi JP1/Automatic Job Management System 3 - Agent, Hitachi JP1/Automatic Job Management System 3 - Agent Minimal Edition 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 JP1/Automatic Job Management System 3 - Manager: 13-50-31, 12-60-53, 11-50-39 (Windows, Linux); 12-60-53, 11-50-39 (AIX, HP-UX, Solaris); JP1/Automatic Job Management System 3 - Agent: 13-50-31, 12-60-53, 11-50-39 (Windows, Linux); 13-10-31, 12-60-53, 11-50-39 (AIX); 12-60-53, 11-50-39 (HP-UX, Solaris); JP1/Automatic Job Management System 3 - Agent Minimal Edition: 13-50-31, 12-60-53, 11-50-39 (Windows, Linux)

## Technical details

A heap-based buffer overflow exists in JP1/Automatic Job Management System 3 Manager and Agent components due to improper input validation. The vulnerability is exploitable over the network without authentication or user interaction (CVSS 3.1 vector: AV:N/AC:L/PR:N/UI:N). Successful exploitation allows remote code execution and partial denial of service.

## Affected products

- Hitachi JP1/Automatic Job Management System 3 - Manager 10-00 to 13-50-04 (Windows, Linux, AIX, HP-UX, Solaris)
- Hitachi JP1/Automatic Job Management System 3 - Agent 10-00 to 13-50-04 (Windows, Linux, AIX, HP-UX, Solaris)
- Hitachi JP1/Automatic Job Management System 3 - Agent Minimal Edition 11-50 to 13-50-02 (Windows, Linux)

## Timeline

- 2026-10-27: disclosed

## References

- [https://www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-139/index.html](https://www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-139/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)