CVE-2026-102106

Received Received - Intake

Authentication Bypass in Kiteworks Email Protection Gateway

Publication date: 2026-09-30

Last updated on: 2026-09-30

Assigner: Cybersecurity and Infrastructure Security Agency (CISA) U.S. Civilian Government

Description

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.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-30

Last Modified

2026-09-30

Generated

2026-10-01

AI Q&A

2026-10-01

EPSS Evaluated

N/A

NVD

CVE-2026-102106

EUVD

EUVD-2026-90313

Affected Vendors & Products

Vendor	Product	Version / Range
kiteworks	email_protection_gateway	*

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-287	When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

Attack-Flow Graph

Executive Summary

This vulnerability is an improper authentication issue in the Kiteworks Email Protection Gateway administrative service. It allows bypassing password checks for valid administrator accounts, enabling unauthorized creation, modification, or deletion of internal users, managed domains, and security configurations without proper authentication.

Impact Analysis

An attacker could exploit this to gain unauthorized access to administrative functions, potentially locking administrators out, deleting user accounts, or altering security settings. This could disrupt email protection services and compromise data integrity.

Compliance Impact

This vulnerability could lead to unauthorized access or deletion of sensitive data, violating confidentiality and integrity requirements in GDPR and HIPAA. Non-compliance risks include fines, legal penalties, and reputational damage due to potential data breaches.

Mitigation Strategies

Apply the latest security patches or updates from Kiteworks to fix the improper authentication issue in the Email Protection Gateway administrative service. Ensure all administrator accounts enforce strict password checks and review configurations to prevent unauthorized access.

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