CVE-2026-27776: intra-mart Accel Platform RCE Vulnerability

CVE-2026-27776 Overview

CVE-2026-27776 is an insecure deserialization vulnerability affecting the IM-LogicDesigner module of intra-mart Accel Platform. This vulnerability allows arbitrary code execution when a specially crafted file is imported by a user with administrative privileges. The vulnerability can only be exploited when IM-LogicDesigner is deployed on the system, limiting the attack surface to environments utilizing this specific module.

Critical Impact

Attackers who can convince or compromise an administrative user to import a malicious file can achieve arbitrary code execution on the affected system, potentially leading to complete system compromise.

Affected Products

• intra-mart Accel Platform with IM-LogicDesigner module deployed
• Systems where administrative users have file import capabilities in IM-LogicDesigner

Discovery Timeline

• 2026-02-27 - CVE-2026-27776 published to NVD
• 2026-02-27 - Last updated in NVD database

Technical Details for CVE-2026-27776

Vulnerability Analysis

This vulnerability falls under CWE-502 (Deserialization of Untrusted Data), a well-documented class of security weaknesses that can have severe consequences. The insecure deserialization issue in IM-LogicDesigner occurs during the file import process, where the application fails to properly validate or sanitize serialized data before processing.

When an administrative user imports a file through the IM-LogicDesigner interface, the application deserializes the contents without adequate security controls. If an attacker crafts a malicious serialized payload within the import file, the deserialization process can instantiate arbitrary objects, leading to code execution in the context of the application.

The network-accessible nature of this vulnerability means attackers can potentially deliver malicious files remotely, though exploitation requires either compromising an administrative account or employing social engineering tactics to convince a legitimate administrator to import the weaponized file.

Root Cause

The root cause of CVE-2026-27776 lies in the IM-LogicDesigner module's failure to implement proper validation of serialized data during the file import functionality. The application accepts and deserializes data from imported files without verifying that the serialized objects are safe to instantiate, creating an opportunity for attackers to inject malicious payloads.

Insecure deserialization vulnerabilities typically arise when applications trust serialized data from untrusted sources, failing to implement defensive measures such as integrity checks, type whitelisting, or sandboxed deserialization environments.

Attack Vector

The attack vector for CVE-2026-27776 requires network access and administrative privileges. An attacker would need to:

1. Craft a malicious file containing a serialized payload designed to execute arbitrary code upon deserialization
2. Deliver this file to an administrative user of the intra-mart Accel Platform
3. Convince the administrator to import the file through the IM-LogicDesigner module

Upon import, the deserialization process executes the embedded payload, granting the attacker code execution capabilities on the target system. This could be leveraged for data exfiltration, lateral movement, persistence establishment, or further system compromise.

The vulnerability mechanism relies on the application's trust in the structure of imported files. When the IM-LogicDesigner module processes an import, it deserializes the file contents to reconstruct application objects. By manipulating the serialized data, an attacker can cause the application to instantiate malicious objects that execute code during the deserialization process. For detailed technical information, refer to the JVN Security Advisory and the Intra-Mart Support Article.

Detection Methods for CVE-2026-27776

Indicators of Compromise

• Unusual file imports within the IM-LogicDesigner module, especially from untrusted sources
• Unexpected process spawning or network connections originating from the intra-mart Accel Platform application
• Anomalous system behavior following administrative file import operations
• Log entries indicating deserialization errors or exceptions during import processes

Detection Strategies

• Monitor and audit all file import activities within the IM-LogicDesigner module
• Implement behavioral analysis to detect anomalous code execution patterns following import operations
• Deploy application-level logging to capture detailed information about imported files and their processing
• Configure intrusion detection systems to alert on suspicious serialized payloads in network traffic

Monitoring Recommendations

• Enable verbose logging for the IM-LogicDesigner module to capture import events
• Establish baselines for normal administrative import activity and alert on deviations
• Monitor system processes for unexpected child processes spawned by the application
• Review application logs regularly for deserialization-related exceptions or errors

How to Mitigate CVE-2026-27776

Immediate Actions Required

• Review and restrict administrative access to the IM-LogicDesigner module to essential personnel only
• Implement strict file validation policies for any files to be imported through IM-LogicDesigner
• Educate administrative users about the risks of importing files from untrusted or unknown sources
• Monitor for any suspicious import activity until patches can be applied

Patch Information

Vendor patches and security updates are available through the official intra-mart support channels. Organizations should consult the Intra-Mart Support Article for specific patch information and update instructions. The JVN Security Advisory provides additional details regarding the vulnerability and remediation guidance.

Workarounds

• Disable the IM-LogicDesigner module if it is not required for business operations
• Implement network segmentation to limit access to the administrative interfaces of intra-mart Accel Platform
• Enforce strict access controls requiring multi-factor authentication for administrative functions
• Establish a file import approval workflow requiring security review of files before import

# Example: Restrict access to IM-LogicDesigner administrative functions
# Consult intra-mart documentation for specific configuration syntax
# Implement network-level restrictions to limit administrative interface access
# Configure web application firewall rules to monitor import endpoints