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

Quick assessment

Affected
ATEN Unizon
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

ATEN Unizon是中国ATEN公司的一款应用服务器软件。 ATEN Unizon 2.7.262.002版本存在路径遍历漏洞，该漏洞源于writeFileToHttpServletResponse方法缺少对用户提供路径的正确验证，可能导致目录遍历攻击，远程攻击者利用此漏洞可泄露敏感信息。

AI Predicted 9.8 Difficulty: Trivial EPSS 1.85% · P79

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery

Affected Version Matrix 1

VendorProduct Version RangeStatus
ATEN Unizon 2.7.262.002 affected
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I. Basic Information for CVE-2026-9776

Vulnerability Information
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Vulnerability Title
ATEN Unizon writeFileToHttpServletResponse Directory Traversal Information Disclosure Vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
ATEN Unizon 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
ATEN Unizon是中国ATEN公司的一款应用服务器软件。 ATEN Unizon 2.7.262.002版本存在路径遍历漏洞，该漏洞源于writeFileToHttpServletResponse方法缺少对用户提供路径的正确验证，可能导致目录遍历攻击，远程攻击者利用此漏洞可泄露敏感信息。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
ATEN Unizon 2.7.262.002 -

II. Public POCs for CVE-2026-9776

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III. Intelligence Information for CVE-2026-9776

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Vendor Advisories for CVE-2026-9776 (1)

Same Patch Batch · ATEN · 2026-06-24 · 6 CVEs total

CVE-2026-9777 ATEN Unizon restoreDB Directory Traversal Remote Code Execution Vulnerability
CVE-2026-9775 ATEN Unizon uploadSSL Directory Traversal Arbitrary File Deletion Vulnerability
CVE-2026-9774 ATEN Unizon updateLicense Directory Traversal Arbitrary File Deletion Vulnerability
CVE-2026-9779 ATEN Unizon doCryptoHugeFileToFile Improper Verification of Cryptographic Signature Remote
CVE-2026-9778 ATEN Unizon ImportDeviceList Directory Traversal Remote Code Execution Vulnerability

IV. Related Vulnerabilities

Same product: Unizon
Same vendor: ATEN
Same weakness: CWE-22

V. Comments for CVE-2026-9776

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