Hitachi JP1/Automatic Job Management System 3: Stack-based buffer overflow
Summary
A stack-based buffer overflow (CWE-121) in Hitachi JP1/Automatic Job Management System 3 (JP1/AJS3) Manager and Agent allows a remote attacker to affect confidentiality, integrity and availability. The CVSS 3.1 base score is 9.4 (Critical), and no privileges or user interaction are required for a network attack. The exact lower bound of the affected versions is disputed between sources, so check your installed versions against the vendor advisory.
Affected
- JP1/Automatic Job Management System 3 - Manager: from 11-00 before 13-50-31 (CNA record; the CNA product data lists 10-00 as the lower bound)
- JP1/Automatic Job Management System 3 - Agent: from 11-00 before 13-50-31 (CNA record; the CNA product data lists 10-00 as the lower bound)
- JP1/Automatic Job Management System 3 - Agent Minimal Edition: from 11-50 before 13-50-31 (CNA product data)
Fixed in
- Manager and Agent, Windows and Linux: 13-50-31
- Manager and Agent, other release lines: 12-60-53 and 11-50-39 (vendor advisory fixed-products table)
- Agent AIX: 13-10-31 (vendor advisory fixed-products table)
- Agent Minimal Edition, Windows and Linux: 13-50-31, 12-60-53 and 11-50-39
- For details on the fixed products, contact your Hitachi support representative.
Workaround
- No vendor workaround identified.
- Until patched, restrict network access to the Manager and Agent ports to known hosts (own recommendation, not a vendor one).
Exploitation
- Not known to be exploited (per OffSeq).
- Not listed in CISA KEV (per Strix).
- No public proof of concept found; this does not prove none exists.
- VulDB shows a "0-Day" status label whose meaning could not be confirmed.
- EPSS: 0.45 % (percentile 39).
Our recommendation
- Treat as high priority.
- Inventory all JP1/AJS3 Manager and Agent installations and confirm their versions.
- Upgrade affected installations to the fixed versions listed above.
- Restrict network access to the Manager and Agent until patched.
- Patch the related Hitachi JP1 CVEs published the same day (CVE-2026-76933 to CVE-2026-76939) together with this one.
- Monitor for unusual activity on job scheduler hosts.
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Hitachi security advisory HITACHI-SEC-2026-139 www.hitachi.com
- Hitachi security advisory HITACHI-SEC-2026-143 www.hitachi.com
- VulDB entry 427095 vuldb.com
- OffSeq radar CVE-2026-76932 radar.offseq.com
- Strix CVE-2026-76932 www.strix.ai
- ThreatInt CVE-2026-76932 cve.threatint.com
- CVEBrief archive 2026/10/28 cvebrief.com
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, 23:48.
Original description (NVD)
Stack-based Buffer Overflow Vulnerability in JP1/Automatic Job Management System 3. This issue affects JP1/Automatic Job Management System 3 - Manager: from 11-00 before 13-50-31; JP1/Automatic Job Management System 3 - Agent: from 11-00 before 13-50-31.
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.
Affected? We can help.
We check whether your systems are affected, install updates and close the gap – continuously with the System Health Checker if you wish.