CVE-2026-53906

Analyzed Analyzed - Analysis Complete

Path Disclosure and Traversal in MCO File Handling

Publication date: 2026-07-01

Last updated on: 2026-07-06

Assigner: CERT.PL

Description

MCO is vulnerable to Path Disclosure and Path Traversal in file handling functionality related to data export and upload. Improper validation of the filename parameter allows writing files to arbitrary locations as well as indirect disclosure of absolute server paths through error messages. Because vendor contact attempts were unsuccessful, the vulnerability has only been confirmed in version 25.3.3.1 but may also affect other versions.

CVSS Scores

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Meta Information

Published

2026-07-01

Last Modified

2026-07-06

Generated

2026-07-21

AI Q&A

2026-07-01

EPSS Evaluated

2026-07-20

NVD

CVE-2026-53906

EUVD

EUVD-2026-40952

Affected Vendors & Products

Vendor	Product	Version / Range
mycomplianceoffice	mycomplianceoffice	25.3.3.1

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-22	The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
CWE-209	The product generates an error message that includes sensitive information about its environment, users, or associated data.

Attack-Flow Graph

Executive Summary

The vulnerability in MCO involves Path Disclosure and Path Traversal issues in its file handling functionality related to data export and upload.

Improper validation of the filename parameter allows an attacker to write files to arbitrary locations on the server.

Additionally, error messages can indirectly disclose absolute server paths, revealing sensitive information about the server's file system.

Impact Analysis

This vulnerability can allow an attacker with certain privileges to write files to arbitrary locations on the server, potentially leading to unauthorized file modification or code execution.

The disclosure of absolute server paths through error messages can provide attackers with information useful for further attacks.

Compliance Impact

The vulnerability in MyComplianceOffice (MCO) involves path disclosure and path traversal, which can lead to unauthorized file writes and indirect disclosure of server paths. Such issues can potentially expose sensitive data or system information.

While the provided context does not explicitly state the impact on compliance with standards like GDPR or HIPAA, vulnerabilities that allow unauthorized data access or disclosure can increase the risk of non-compliance with data protection regulations. This is because these regulations require safeguarding personal and sensitive information against unauthorized access and ensuring data integrity.

Therefore, this vulnerability could undermine compliance efforts by exposing sensitive data or system details, which may lead to regulatory violations if exploited.

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