How severe is CVE-2026-9776?

CVE-2026-9776 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2026-9776 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-9776?

CVE-2026-9776 affects Aten Unizon. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-9776?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-9776 have an EU (EUVD) identifier?

Yes. CVE-2026-9776 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39114.

When was CVE-2026-9776 published?

CVE-2026-9776 was published on 2026-06-24 and last updated on 2026-06-27.

CVE-2026-9776

CVE-2026-9776 is a high-severity vulnerability in Aten Unizon with a CVSS 3.x base score of 7.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-22.

Key facts

Severity: High (CVSS 3.x base score 7.5)
EPSS exploit prediction: 2% (73rd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-39114
Weakness: CWE-22
Affected product: Aten Unizon
Published: 2026-06-24
Last modified: 2026-06-27

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.

Frequently asked questions

What is 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.
How severe is CVE-2026-9776?: CVE-2026-9776 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2026-9776 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (73rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-9776?: CVE-2026-9776 affects Aten Unizon. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-9776?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-9776 have an EU (EUVD) identifier?: Yes. CVE-2026-9776 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-39114.
When was CVE-2026-9776 published?: CVE-2026-9776 was published on 2026-06-24 and last updated on 2026-06-27.

References

Affected products (1)

cpe:2.3:a:aten:unizon:*:*:*:*:*:*:*:*

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