CVE-2025-52642: HCL AION Information Disclosure Flaw

CVE-2025-52642 Overview

HCL AION is affected by an information disclosure vulnerability where internal filesystem paths may be exposed through application responses or system behaviour. This vulnerability allows attackers with local access to gain insights into the environment's directory structure, potentially aiding in reconnaissance for further targeted attacks or additional information disclosure.

Critical Impact

Exposure of internal filesystem paths can reveal environment structure details, directory layouts, and installation paths that attackers could leverage to plan subsequent exploitation attempts against the affected system.

Affected Products

• HCL AION

Discovery Timeline

• 2026-03-16 - CVE CVE-2025-52642 published to NVD
• 2026-03-17 - Last updated in NVD database

Technical Details for CVE-2025-52642

Vulnerability Analysis

This vulnerability is classified under CWE-538 (Insertion of Sensitive Information into Externally-Accessible File or Directory). The weakness occurs when HCL AION inadvertently exposes internal filesystem paths through application responses or observable system behaviour. This type of information leakage, while not directly exploitable for remote code execution, provides valuable reconnaissance data to attackers who have gained local access to the system.

The exposure of filesystem paths reveals implementation details about how the application is deployed, including installation directories, configuration file locations, and the overall directory structure. This information can be particularly valuable in multi-stage attack scenarios where an attacker is attempting to escalate privileges or pivot to other components within the environment.

Root Cause

The root cause stems from improper handling of sensitive path information within application responses. When the application processes certain requests or encounters specific conditions, internal filesystem paths are included in error messages, logs, or other output that can be observed by users with local access. This represents a failure to sanitize or mask sensitive environmental details before they are exposed externally.

Attack Vector

The attack vector is local, requiring the attacker to have existing access to the affected system. The exploitation requires low privileges and relies on user interaction, making it a targeted attack scenario rather than an opportunistic one. An attacker must be able to trigger specific application behaviours or access particular response data to extract the exposed filesystem paths.

The attacker could trigger this vulnerability by:

• Inducing error conditions that expose paths in error messages
• Monitoring application logs or debug output that contain path information
• Observing system behaviour that reveals directory structures
• Analyzing application responses that inadvertently include path data

Detection Methods for CVE-2025-52642

Indicators of Compromise

• Unusual access patterns to application log files or error outputs
• Evidence of systematic probing of application error handling mechanisms
• Access attempts to directories or files that match patterns revealed through path disclosure
• Suspicious local user activity focused on information gathering

Detection Strategies

• Monitor application logs for requests that frequently trigger error responses
• Implement file integrity monitoring on sensitive configuration directories
• Review audit logs for patterns consistent with reconnaissance activity
• Deploy endpoint detection to identify local information gathering behaviour

Monitoring Recommendations

• Enable verbose logging for HCL AION application access
• Monitor for sequential access patterns that suggest directory enumeration
• Set up alerts for access to sensitive system information endpoints
• Implement user behaviour analytics to detect anomalous local access patterns

How to Mitigate CVE-2025-52642

Immediate Actions Required

• Review the HCL Software Knowledge Base Article for vendor-specific guidance
• Audit application configurations to identify and suppress path disclosure in error messages
• Restrict local access to HCL AION systems to only authorized personnel
• Review and limit permissions for accessing application logs and error outputs

Patch Information

HCL has published guidance for this vulnerability. System administrators should consult the HCL Software Knowledge Base Article for detailed patch information, affected versions, and remediation steps. Apply vendor-recommended patches as soon as they are available and tested in your environment.

Workarounds

• Configure custom error pages that do not expose internal path information
• Implement application-level filtering to sanitize filesystem paths from responses
• Restrict access to verbose logging and debug outputs to administrative users only
• Apply the principle of least privilege to limit users who can observe system behaviour

Organizations should assess this vulnerability in context with their specific deployment, as the local access requirement and user interaction dependency reduce the likelihood of opportunistic exploitation.