CVE-2026-9776
Received Received - Intake
Directory Traversal in ATEN Unizon Information Disclosure

Publication date: 2026-06-24

Last updated on: 2026-06-24

Assigner: Zero Day Initiative

Description
ATEN Unizon writeFileToHttpServletResponse Directory Traversal Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information on affected installations of ATEN Unizon. Authentication is not required to exploit this vulnerability. The specific flaw exists within the writeFileToHttpServletResponse method. The issue results from the lack of proper validation of a user-supplied path prior to using it in file operations. An attacker can leverage this vulnerability to disclose information in the context of SYSTEM. Was ZDI-CAN-28505.
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Meta Information
Published
2026-06-24
Last Modified
2026-06-24
Generated
2026-06-25
AI Q&A
2026-06-25
EPSS Evaluated
N/A
NVD
CVE-2026-9776
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
aten unizon *
Helpful Resources
Exploitability
CWE
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KEV
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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.
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Executive Summary

This vulnerability exists in the ATEN Unizon software, specifically in the writeFileToHttpServletResponse method. It is a directory traversal information disclosure flaw that allows remote attackers to access sensitive information without needing to authenticate. The root cause is the lack of proper validation of user-supplied file paths before they are used in file operations, which enables attackers to read files on the system with SYSTEM-level privileges.

Impact Analysis

This vulnerability can lead to unauthorized disclosure of sensitive information on affected systems. Since it can be exploited remotely without authentication and runs with SYSTEM privileges, an attacker could access critical files and data, potentially compromising the confidentiality of the system and its information.

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