---
id: CVE-2026-102106
title: >-
  Improper authentication in a Kiteworks Email Protection Gateway administrative
  service
summary: >-
  Improper authentication in a Kiteworks Email Protection Gateway administrative
  service. An administrative service in Kiteworks Email Protection Gateway did
  not consistently enforce administrator authentication, so the required
  password c…
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H'
cwe:
  - CWE-287
vendor: Kiteworks
product: Email Protection Gateway
affected:
  - email_protection_gateway < 9.5.0
published: '2026-09-30'
updated: '2026-09-30'
sourceUpdated: '2026-09-30T21:16:57.490'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-102106'
references:
  - url: >-
      https://github.com/kiteworks/security-advisories/security/advisories/GHSA-wwv8-qhqg-4q76
    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
ingestedAt: '2026-09-30T21:25:07.824Z'
---

## Overview

Improper authentication in a Kiteworks Email Protection Gateway administrative service. An administrative service in Kiteworks Email Protection Gateway did not consistently enforce administrator authentication, so the required password check could be bypassed. An attacker who referenced a valid administrator account could potentially create, modify, or delete internal users and managed domains and change their security-feature configuration without authenticating; deleting a managed domain also removes its user accounts and could lock administrators out of the gateway.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.