Hitachi JP1/Base: Heap-based buffer overflow
Summary
Hitachi JP1/Base, a component of the JP1 job management and systems management products, contains a heap-based buffer overflow (CWE-122 per the CNA; VulDB lists CWE-120). According to the CVSS 3.1 vector, the flaw can be exploited remotely over the network without privileges or user interaction and can lead to full loss of confidentiality, integrity and availability. Whether the vulnerable code path is reachable before authentication has not been confirmed.
Affected
- JP1/Base Linux, Solaris, HP-UX: 12-50 to 12-50-53, 12-10 to 12-10-11, 12-00 to 12-00-34, 11-50 to 11-50-35, 11-10 to 11-10-32, 11-00 to 11-00-31
- JP1/Base AIX: 12-50 to 12-50-53, 12-10 to 12-10-11, 12-00 to 12-00-34, 11-50 to 11-50-34, 11-10 to 11-10-32, 11-00 to 11-00-31
- The CNA record describes the range as 11-00 before 12-50-54; this conflicts with the vendor advisory for the 11-50 line.
- Windows is covered by the companion advisory HITACHI-SEC-2026-155 (CVE-2026-86575).
Fixed in
- JP1/Base 12-50-54 (Linux, AIX, HP-UX, Solaris)
- JP1/Base 11-50-36 (Linux, AIX, HP-UX, Solaris), pending confirmation with Hitachi support because of the CNA range discrepancy
- Fix status for the 12-00, 12-10, 11-00 and 11-10 lines: Unknown.
Workaround
Unknown. No vendor workaround is published in the advisory; Hitachi directs customers to its support representative.
Exploitation
- No public proof of concept found; VulDB reports no exploit available.
- Not listed in CISA KEV at the time of research.
- Whether attack traffic has been observed is unclear.
- EPSS: 0.52 % (percentile 44).
Our recommendation
- Inventory all hosts with JP1/Base, including those installed as part of JP1/IM or JP1/AJS and Windows systems, and record exact version and OS.
- Plan upgrades to 12-50-54 (and 11-50-36 where applicable) after confirming with Hitachi support.
- For the 12-00, 12-10, 11-00 and 11-10 lines, obtain the fix or interim guidance from Hitachi support.
- Restrict network access to JP1 services to known management hosts and check for external exposure.
- Re-check the NVD record, CISA KEV and VulDB for changes.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Hitachi advisory HITACHI-SEC-2026-156 www.hitachi.com
- Hitachi advisory HITACHI-SEC-2026-155 www.hitachi.com
- VulDB CVE-2026-86574 vuldb.com
- Strix CVE-2026-86574 www.strix.ai
- OffSeq CVE-2026-86574 radar.offseq.com
- JP1/Base product documentation itpfdoc.hitachi.co.jp
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 30 Oct 2026, 16:26.
Original description (NVD)
Heap-based Buffer Overflow Vulnerability in JP1/Base. This issue affects JP1/Base: from 11-00 before 12-50-54.
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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