External risk intelligence

JP1 Automatic Job Management System Stack Buffer Overflow

CVE advisorySeverity: CRITICAL (CVSS 9.8)

CVE-2026-76934

JP1/Automatic Job Management System is an enterprise workload automation and job scheduling product. While it operates over a network to manage jobs between managers and agents, it is typically deployed within internal corporate networks and behind firewalls to manage backend infrastructure, making direct public internet exposure uncommon in standard real-world deployments.

Buffer Overflow

Halo Surface Signal: 2 out of 5 — less likely to be public-facing.

External exposure likelihood

Horizon Alert

Summary of the vulnerability and why it matters

A critical vulnerability has been identified in JP1/Automatic Job Management System 3, a software used for automating jobs and managing workflows. This issue could allow unauthorized access and control over systems managed by this software, potentially impacting business operations. The primary concern is to determine if your organization utilizes this specific product and is therefore exposed.

It allows unauthorized system control.
It affects critical business automation.
Confirm relevance and exposure.

Attack Path

How an attacker could exploit the issue

An attacker could exploit this vulnerability by sending specially crafted data over the network to the JP1/Automatic Job Management System Manager component. Successful exploitation could allow an attacker to remotely execute code, leading to a compromise of the affected system. The specific details of how this data is crafted or what form it takes are not provided.

No authentication or user interaction required.
Specially crafted network data sent to Manager.
Remote code execution and system compromise.

Live Threat

Current exploitation, exposure, and threat context

A stack-based buffer overflow vulnerability in JP1/Automatic Job Management System 3 could allow an unauthenticated, remote attacker to execute arbitrary code on the affected system. This could occur when the system processes specially crafted data. The impact could include unauthorized system control or data compromise.

System control could be compromised.
Specially crafted data can be processed.
Remote code execution is possible.

Operational Fix

Recommended remediation, mitigation, and detection steps

Teams responsible for JP1/Automatic Job Management System 3, likely including infrastructure or platform teams, should begin by identifying all instances of the affected software. Confirming network exposure and business criticality for each instance will help prioritize remediation efforts, involving the accountable system owner to plan for necessary maintenance or vendor coordination.

Infrastructure or platform teams own this.
Verify network exposure and business criticality.
Plan coordinated remediation with owners.

Supplementary metadata

CVSS vector

Validate whether this threat affects your internet-facing exposure.

Halo Threat Intelligence helps prioritize remediation with Halo Surface Signal and H/A/L/O context. Start exposure validation with a free external attack surface trial.

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Frequently asked questions

What is JP1/Automatic Job Management System 3?

It is an enterprise workload automation and job scheduling platform. Large organizations use it to orchestrate, monitor, and manage complex backend business processes and task sequences across distributed server environments, ensuring that automated jobs execute reliably.

What is the CVE-2026-76934 vulnerability?

This is a stack-based buffer overflow, categorized as CWE-121. It occurs when a program writes more data to a memory buffer than it can hold, overwriting adjacent memory. In this case, processing malicious network data can cause the software to crash or execute unauthorized commands.

How is this buffer overflow triggered?

An attacker triggers this by sending specially crafted data over the network to the Manager component. The vulnerability does not require authentication or user interaction. Note that internal system actions or logs that do not involve receiving untrusted network data do not inherently trigger this flaw.

Is my system at risk?

Halo Surface Signal indicates this software is typically deployed within internal corporate networks and behind firewalls, making direct public internet exposure uncommon. Organizations should still verify their own network architecture to see if any Manager components are reachable from untrusted zones.

What steps should I take to respond?

Start by identifying all deployed instances of the Manager and Agent components within your environment. Once mapped, assess their network accessibility and business criticality. Coordinate with the relevant system owners to prepare for maintenance, such as patching, once the vendor provides the specific fix.

References

www.hitachi.com/products/it/software/security/info/vuls/hitachi-sec-2…

Written by Nicholas Merritt

Nicholas Merritt is VP of Security Solutions at Halo Security. With more than 25 years across application security, vulnerability prioritization, and offensive security, he helps teams translate threat data into practical exposure validation and remediation focus. He authors Halo Threat Intelligence CVE advisories using Halo Surface Signal and H/A/L/O context to prioritize internet-facing risk.