# CVE-2026-86575: Hitachi JP1 stack-based buffer overflow Source: https://junglewise.ai/threats/cve-2026-86575-stack-based-buffer-overflow-vulnerability-in-jp1-products-this 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-2026-86575 · Severity: critical · CVSS 9.4 · Published 2026-10-27 A stack-based buffer overflow vulnerability in Hitachi's JP1 management software allows unauthenticated remote attackers to execute arbitrary code over the network. JP1 is used to manage enterprise IT infrastructure and automate job scheduling; exploitation could lead to complete compromise of the management infrastructure and all monitored systems. The vulnerability requires no user interaction and affects multiple product lines including Integrated Management, Automatic Job Management System, and Base components. 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), [Hitachi JP1/Base](https://junglewise.ai/threats/technologies/jp1-base), [Hitachi JP1/Integrated Management 3 - Manager](https://junglewise.ai/threats/technologies/jp1-integrated-management-3-manager). Vendors: [Hitachi](https://junglewise.ai/threats/vendors/hitachi). ## Quick answers **Is CVE-2026-86575 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-86575 being exploited in the wild. **How severe is CVE-2026-86575?** 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 13-00-00 through 13-00-06, 13-10-00 through 13-10-06, 13-50-00 through 13-50-04; Hitachi JP1/Automatic Job Management System 3 - Agent Minimal Edition 13-00-00 through 13-00-06, 13-10-00 through 13-10-06, 13-50-00 through 13-50-02; Hitachi JP1/Automatic Job Management System 3 - Manager 13-00-00 through 13-00-09 (Windows), 13-00-00 through 13-00-08 (Linux), 13-10-00 through 13-10-06, 13-50-00 through 13-50-04; Hitachi JP1/Base 11-00-00 through 11-00-31, 11-10-00 through 11-10-32, 11-50-00 through 11-50-35, 12-00-00 through 12-00-34, 12-10-00 through 12-10-11, 12-50-00 through 12-50-53; and 1 more. **Is there a fix for CVE-2026-86575?** 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 (Windows/Linux), 13-10-31 (AIX); 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-2026-86575 attacked?** It is attacked over the network, in a software library. **Am I affected by CVE-2026-86575?** 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 (Windows/Linux), 13-10-31 (AIX); JP1/Automatic Job Management System 3 - Agent Minimal Edition: 13-50-31; JP1/Base: 12-50-54, 11-50-36 ## Technical details The stack-based buffer overflow exists in JP1/Base component, which is used by multiple JP1 products. The vulnerability is remotely exploitable over the network without authentication (CVSS vector: AV:N/AC:L/PR:N/UI:N). Successful exploitation allows an attacker to achieve code execution with high impact on confidentiality, integrity, and partial availability. ## Affected products - Hitachi JP1/Integrated Management 3 - Manager 13-00-00 through 13-00-07, 13-01-00 through 13-01-05, 13-10-00 through 13-10-05, 13-50-00 through 13-50-01 - Hitachi JP1/Automatic Job Management System 3 - Manager 13-00-00 through 13-00-09 (Windows), 13-00-00 through 13-00-08 (Linux), 13-10-00 through 13-10-06, 13-50-00 through 13-50-04 - Hitachi JP1/Automatic Job Management System 3 - Agent 13-00-00 through 13-00-06, 13-10-00 through 13-10-06, 13-50-00 through 13-50-04 - Hitachi JP1/Automatic Job Management System 3 - Agent Minimal Edition 13-00-00 through 13-00-06, 13-10-00 through 13-10-06, 13-50-00 through 13-50-02 - Hitachi JP1/Base 11-00-00 through 11-00-31, 11-10-00 through 11-10-32, 11-50-00 through 11-50-35, 12-00-00 through 12-00-34, 12-10-00 through 12-10-11, 12-50-00 through 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](https://www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2026-155/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/Base heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-86574-heap-based-buffer-overflow-vulnerability-in-jp1-base-this-issue) - [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)