CVE-2026-9776 - ATEN Unizon writeFileToHttpServletResponse Directory Traversal Information Disclosure Vulnerability

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HIGH

ATEN Unizon writeFileToHttpServletResponse Directory Traversal Information Disclosure Vulnerability

Published Jun 24, 2026

7.5

HIGH

CVSS 3.0

EPSS 1.85%

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.

Affected products

Vendor ATEN Product Unizon Default
n/a
- Version
  2.7.262.002
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

ATEN

Unizon

n/a

Version	Status	Constraints
2.7.262.002	affected	-

Remediation

No remediation recorded yet.

Weaknesses (1)

CWE-22

Path Traversal

References (3)

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-39114
Advisory
https://www.aten.com/global/en/supportcenter/info/security-advisory/29/
vendor-advisoryVendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-26-380/
x_research-advisoryThird Party Advisory

Link	Providers	Tags
https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-39114		Advisory
https://www.aten.com/global/en/supportcenter/info/security-advisory/29/		vendor-advisoryVendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-26-380/		x_research-advisoryThird Party Advisory