Kiteworks Email Protection Gateway improper authentication (CVE-2026-102106) | HOL Guard CVE

Critical · CVSS 9.1CVE-2026-102106

Kiteworks Email Protection Gateway improper authentication

Answer in brief

CVE-2026-102106 records a Critical severity (CVSS 9.1) vulnerability in Kiteworks Email Protection Gateway improper authentication. The current sources do not mark it as known exploited. The current feed maps Kiteworks/Email Protection Gateway (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Sep 30, 2026Updated Sep 30, 2026Source checked Sep 30, 2026First seen by HOL Sep 30, 2026Material review Sep 30, 2026

Upstream Advisory

Key facts

Risk: Critical · CVSS 9.1
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 9.1. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Kiteworks/Email Protection Gateway (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
Package	Affected range	Fixed version
Kiteworks/Email Protection Gatewaygeneric	>=0 <9.5.0	9.5.0

Recommended response

Check inventory. Check lockfiles and deployed manifests for Kiteworks/Email Protection Gateway.
Review the reported fix. Update Kiteworks/Email Protection Gateway to 9.5.0 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

Published upstream
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
Source modified
Sep 30, 2026
Evidence: source:cvelist:source_dates:source-dates:record
First seen by HOL
Sep 30, 2026

Sources and claim methodology

Upstream source 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.

Quoted source text, attributed separately from HOL analysis.