All vulnerabilities
CVE-2026-102135GHSA-vmwr-r5xq-hp49

Kiteworks Email Protection Gateway Deserialization of Untrusted Data

Kiteworks Email Protection GatewayNetwork & edge
Open in ThreatlineRecord JSON
CVSS
6.6Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)1.28%Chance of exploitation activity in the next 30 days, higher than 69% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed in9.5.1Fixed versionCVE List
Published30 Sep 2026Updated 1 Oct 2026CVE List

What fixes it

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

Description

On a Kiteworks Email Protection Gateway cluster with database replication enabled, a party trusted by the cluster could submit a crafted serialized object that was deserialized without sufficient validation, potentially allowing code execution as the gateway service account. Replication is disabled by default, and exploitation requires control of a trusted cluster peer or administrative access to the appliance.

Text from CVE List

Affected versions 2

  • Email Protection Gatewayaffected: all versions before 9.5.1CVE List
  • Email Protection Gatewayunaffected: 9.5.1CVE List

References 2