CVE-2026-86577 in JP1
Summary
by MITRE • 10/27/2026
Out-of-bounds Write Vulnerability in JP1 Products.
This issue affects JP1/Integrated Management 3 - Manager: from 13-00 before 13-50-31; JP1/Automatic Job Management System 3 - Manager: from 13-00 before 13-50-31; JP1/Automatic Job Management System 3 - Agent: from 13-00 before 13-50-31; JP1/Automatic Job Management System 3 - Agent Minimal Edition: from 13-00 before 13-50-31; JP1/Base: from 11-00 before 12-50-54.
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Analysis
by VulDB Data Team • 10/27/2026
The identified vulnerability represents a critical out-of-bounds write condition within the core components of Fujitsu’s JP1 enterprise management suite, specifically impacting the Manager and Agent modules across multiple product lines including Integrated Management 3, Automatic Job Management System 3, and Base systems. This flaw is characterized by an improper memory access error where the application writes data to a memory location that lies outside the intended buffer boundary. Such vulnerabilities typically arise from insufficient validation of input parameters or incorrect calculations regarding array indices during runtime operations. In the context of enterprise management software like JP1, which handles sensitive operational data and system configurations, this type of flaw poses significant risks beyond simple application crashes, as it can potentially allow an attacker to corrupt adjacent memory structures, overwrite function pointers, or manipulate control flow logic within the process space.
The technical nature of an out-of-bounds write is particularly dangerous because it provides a mechanism for arbitrary code execution if the overwritten data includes critical security controls such as stack cookies or return addresses. While not all instances lead directly to remote code execution, they often result in denial of service conditions through segmentation faults or memory corruption that destabilizes the host system. For JP1 products, which are frequently deployed in mission-critical environments managing large-scale IT infrastructure, any instability can disrupt automated job scheduling and monitoring capabilities. The vulnerability affects versions starting from 13-00 up to but not including version 13-50-31 for most components, indicating that older releases within this major version line are susceptible until the specific patch level is applied. Similarly, JP1/Base systems running versions prior to 12-50-54 remain exposed to similar risks due to shared underlying codebases or legacy implementation patterns in memory management routines.
From a threat modeling perspective, this vulnerability aligns with Common Weakness Enumeration identifier CWE-787, which defines out-of-bounds write as accessing a memory location beyond the allocated buffer boundary. It also relates closely to CWE-120, Buffer Copy without Checking Size of Input, suggesting that the root cause likely involves functions such as memcpy or strcpy being used without adequate bounds checking against user-supplied or internally generated data lengths. In terms of MITRE ATT&CK mapping, exploitation of this flaw could facilitate initial access or privilege escalation depending on the execution context and whether the affected service runs with elevated privileges. Attackers might leverage crafted inputs to trigger the memory corruption during routine management operations, potentially leading to unauthorized control over the managed systems if the vulnerability is reachable via network interfaces or exposed APIs within the JP1 architecture.
The operational impact of this vulnerability extends beyond immediate system compromise. Since JP1 products are central to IT service management and automation workflows, a successful exploitation could lead to data integrity issues, where critical configuration files or job logs are corrupted by random memory writes. This corruption can cause cascading failures in dependent systems that rely on accurate status reporting from the JP1 manager. Furthermore, if an attacker gains code execution capabilities through this vulnerability, they could establish persistent backdoors within the management infrastructure, using it as a pivot point to attack other segments of the network. The broad version range affected underscores the need for immediate inventory verification and patch deployment across all relevant environments to prevent potential exploitation by adversaries seeking to disrupt business continuity or exfiltrate sensitive operational data.
Mitigation strategies must prioritize the application of vendor-provided patches that address the specific memory handling flaws within the identified component versions. Organizations should immediately verify their current JP1 installation levels against the specified thresholds, ensuring that Manager components are updated to version 13-50-31 or later and Base systems are upgraded to at least version 12-50-54. In addition to patching, implementing network segmentation to restrict access to JP1 management interfaces can reduce the attack surface available to potential exploiters. Security teams should also monitor for anomalous memory usage patterns or unexpected process terminations that might indicate attempted exploitation of this out-of-bounds write condition. Regular vulnerability scanning and adherence to secure coding practices in any custom integrations with JP1 APIs will further harden the environment against similar memory corruption vulnerabilities, ensuring robust protection for critical enterprise management operations.