Vulnerability · Published Sep 30, 2026 · Assigned by cisa-cg
CVE-2026-102143Kiteworks Email Protection Gateway Unrestricted Upload of File with Dangerous Type
High 7.5
In plain English
A high-severity missing authentication in Email Protection Gateway from Kiteworks. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities).
Official description
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 products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| Kiteworks | Email Protection Gateway | 0 – before 9.5.1 |
Weakness: CWE-306, CWE-434 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N