CVE-2026-9776

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.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector : AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Exploitability : 3.9 / Impact : 3.6

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact NONE

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://www.aten.com/global/en/supportcenter/info/security-advisory/29/	Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-26-380/	Third Party Advisory

Configurations

Configuration 1 (hide)

cpe:2.3:a:aten:unizon:*:*:*:*:*:*:*:*

History

25 Oct 2026, 23:10

Type	Values Removed	Values Added
Summary		(es) Vulnerabilidad de revelación de información por salto de directorio en writeFileToHttpServletResponse de ATEN Unizon. Esta vulnerabilidad permite a atacantes remotos revelar información sensible en instalaciones afectadas de ATEN Unizon. La autenticación no es necesaria para explotar esta vulnerabilidad. La falla específica existe dentro del método writeFileToHttpServletResponse. El problema se debe a la falta de validación adecuada de una ruta proporcionada por el usuario antes de usarla en operaciones de archivo. Un atacante puede aprovechar esta vulnerabilidad para revelar información en el contexto de SYSTEM. Fue ZDI-CAN-28505.

Information

Published : 2026-06-24 22:16

Updated : 2026-10-25 23:10

NVD link : CVE-2026-9776

Mitre link : CVE-2026-9776

CVE.ORG link : CVE-2026-9776

JSON object : View

Products Affected

aten

unizon

CWE

CWE-22

Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

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