Path Traversal in Aten Unizon
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.
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.019 (78.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 78.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000
Affected products
- Aten Unizon — versions 2.7.262.002
Weakness classification (CWE)
References
- www.zerodayinitiative.com/advisories/ZDI-26-380/ (x_research-advisory, Third Party Advisory)
- www.aten.com/global/en/supportcenter/info/security-advisory/29/ (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-9776?
- CVE-2026-9776 is a high-severity vulnerability in Aten Unizon, classified under Path Traversal. CVSS score: 7.5/10. Published 2026-06-24.
- How severe is CVE-2026-9776?
- High severity. CVSS v3 base score is 7.5 out of 10.