Kiteworks Email Protection Gateway Improper Access Control (CVE-2026-102149) | HOL Guard CVE

Critical · CVSS 9.4CVE-2026-102149

Kiteworks Email Protection Gateway Improper Access Control

Answer in brief

CVE-2026-102149 records a Critical severity (CVSS 9.4) vulnerability in Kiteworks Email Protection Gateway Improper Access Control. 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 9.4
Exploitation: Not marked as known exploited
Affected software: 1 mapped package or product
Fix availability: Available

Why this deserves its current priority

CVSS is 9.4. 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 <9.5.1	9.5.1

Recommended response

Check inventory. Check lockfiles and deployed manifests for Kiteworks/Email Protection Gateway.
Review the reported fix. Update Kiteworks/Email Protection Gateway to 9.5.1 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

Kiteworks Email Protection Gateway did not sufficiently restrict which account a certificate could be assigned to. This could allow an attacker to associate a certificate with another user's account, affecting the confidentiality and integrity of that account's encrypted mail and, where certificate-based login is enabled, potentially permitting unauthorized access to the account.

Quoted source text, attributed separately from HOL analysis.