CVE-2026-9776CWE-22

ATEN Unizon writeFileToHttpServletResponse Directory Traversal Information Disclosure Vulnerability

High · published June 24, 2026

CVSS v3.0
7.5
EPSS
2%
Percentile
79.0
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.0
7.5 · HIGH
Vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CVSS v4.0
Not supplied
EPSS
0.01851 · 79.0th percentile
Weakness
CWE-22 · Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')
Published
2026-06-24T21:36Z
EPSS history
Timeline
  • 24 JUN 21:36Z
    ATEN Unizon writeFileToHttpServletResponse Directory Traversal Information Disclosure Vulnerability
    cvelistv5