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CVE-2026-102143GHSA-3p9g-jh62-8f89

Kiteworks Email Protection Gateway Unrestricted Upload of File with Dangerous Type

Kiteworks Email Protection GatewayNetwork & edge
Open in ThreatlineRecord JSON
CVSS
7.5High
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.32%Chance of exploitation activity in the next 30 days, higher than 24% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in9.5.1Fixed versionCVE List
Published30 Sep 2026Updated 2 Oct 2026CVE List

What fixes it

  • 9.5.1Email Protection GatewayCVE List
  • 9.5.1Kiteworks Email Protection Gateway, otherGitHub

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

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.

Text from CVE List

Affected versions 3

  • Email Protection Gatewayaffected: all versions before 9.5.1CVE List
  • Email Protection Gatewayunaffected: 9.5.1CVE List
  • Kiteworks Email Protection Gateway, other< 9.5.1GitHub

References 2