CVE-2026-9776

High

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.

SeverityHigh

CVSS7.5

Exploit probability—

ProductAten Unizon

PublishedJun 24, 2026

First seenJun 24, 2026

Weakness typeCWE-22Path traversal

How to fix

Update

aten unizon2.7.264 or later

Vendor advisories

aten.com/global/en/supportcenter/info/security-advisory/29/

Affected products

Product	Affected versions	Fixed in
aten unizon	v < 2.7.264	2.7.264

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