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CVE-2026-9776

ATEN Unizon writeFileToHttpServletResponse Directory Traversal Information Disclosure Vulnerability

HIGH
7.5
CVSS Score
Published: June 24, 2026 at 09:36 PM UTC
Updated: October 25, 2026 at 11:10 PM UTC
1 product affected across 1 vendorUnizon

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Severity
HIGH7.5
Exploit prediction
EPSS 2%
SSVC
No known exploit

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Unizon· Aten
95%
v < 2.7.2642.7.262.002
Affected range stops below 2.7.264, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (2)

x_research-advisoryThird Party Advisory
Source: cverecord
https://www.zerodayinitiative.com/advisories/ZDI-26-380/
Vendor Advisory
Source: cverecord
https://www.aten.com/global/en/supportcenter/info/security-advisory/29/

SSVC — Action Prioritization

SSVCNo known exploitAutomatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

7.5HIGHzdi
Vector?

Quick Info

StatusANALYZED
CWE
CWE-22

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