CVE-2026-28270
Received Received - Intake
Arbitrary File Upload Vulnerability in Kiteworks PDN Before

Publication date: 2026-02-27

Last updated on: 2026-03-04

Assigner: GitHub, Inc.

Description
Kiteworks is a private data network (PDN). Prior to version 9.2.0, a vulnerability in Kiteworks configuration allows uploading of arbitrary files without proper validation. Malicious administrators could exploit this to upload unauthorized file types to the system. Version 9.2.0 contains a patch for the issue.
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Meta Information
Published
2026-02-27
Last Modified
2026-03-04
Generated
2026-06-16
AI Q&A
2026-02-27
EPSS Evaluated
2026-06-15
NVD
CVE-2026-28270
EUVD
EUVD-2026-9065
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
accellion kiteworks to 9.2.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-434 The product allows the upload or transfer of dangerous file types that are automatically processed within its environment.
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Executive Summary

CVE-2026-28270 is a moderate severity vulnerability in Kiteworks Core versions prior to 9.2.0 caused by an unrestricted file upload flaw. This flaw allows malicious administrators with high privileges to upload arbitrary and potentially dangerous file types without proper validation. The vulnerability can be exploited remotely over the network and does not require user interaction.

Impact Analysis

The vulnerability primarily impacts data integrity because unauthorized file uploads could lead to modification of system data. However, it does not affect confidentiality or availability of the system. Exploitation requires high privileges, so only malicious administrators can exploit this flaw.

Compliance Impact

I don't know

Detection Guidance

I don't know

Mitigation Strategies

To mitigate this vulnerability, you should upgrade Kiteworks Core to version 9.2.0 or later, which contains the patch for the unrestricted file upload flaw.

Since the vulnerability requires high privileges to exploit, ensure that administrative access is tightly controlled and monitored to prevent malicious administrators from exploiting this issue.

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