CVE-2026-102143: Kiteworks Email Protection Gateway Unrestricted Upload of File with Dangerous Type
Published Sep 30, 2026
·Updated
An unauthenticated attacker could cause a file with attacker-controlled content to be written to the appliance filesystem through an administrative upload handler that did not properly authenticate the request. This did not by itself result in code execution, which would require a separate vulnerability to place the file in an executable location.
Affected Software
2 affected components
Kiteworks Email Protection Gateway
Accellion Kiteworks<9.5.1
Event History
Sep 30, 2026
CVE Published
via MITRE·08:10 PM
Data Sourced
via MITRE·08:10 PM
DescriptionSeverityWeakness
Data Sourced
via NVD·09:17 PM
DescriptionSeverityWeaknessAffected Software
Frequently Asked Questions
1
Who can exploit this issue?
An unauthenticated remote attacker can exploit the administrative upload handler. No credentials or user interaction are required.
2
Does successful exploitation provide code execution?
No. The issue allows an attacker-controlled file to be written to the appliance filesystem, but code execution requires a separate vulnerability that places the file in an executable location.