---
id: CVE-2026-102135
title: >-
  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 exe…
summary: >-
  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 exe…
severity: medium
cvss: 6.6
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-502
vendor: accellion
product: kiteworks
affected:
  - kiteworks < 9.5.1
patched:
  - kiteworks 9.5.1
published: '2026-09-30'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T13:45:13.707'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102135'
references:
  - url: >-
      https://github.com/kiteworks/security-advisories/security/advisories/GHSA-vmwr-r5xq-hp49
    label: 9119a7d8-5eab-497f-8521-727c672e3725
  - url: >-
      https://raw.githubusercontent.com/cisagov/CSAF/develop/csaf_files/VA/white/2026/va-26-274-01.json
    label: 9119a7d8-5eab-497f-8521-727c672e3725
tags:
  - nvd
  - cve.org
epss: 0.01276
epssPercentile: 0.69787
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-01T13:24:05.305556Z'
ingestedAt: '2026-09-30T21:25:07.834Z'
---

## Overview

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.

## Affected

- `kiteworks < 9.5.1`

## Remediation

Upgrade past the affected range:

- `kiteworks 9.5.1`