CVE-2026-84386

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Unverified Ownership Vulnerability in Fortinet FortiClientWindows

Publication date: 2026-09-08

Last updated on: 2026-10-02

Assigner: Fortinet, Inc.

Description

A unverified ownership vulnerability in Fortinet FortiClientWindows 7.4.0 through 7.4.7, FortiClientWindows 7.2 all versions may allow attacker to improper access control via via an exposed minifilter communication port.

CVSS Scores

EPSS Scores

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Meta Information

Published

2026-09-08

Last Modified

2026-10-02

Generated

2026-10-19

AI Q&A

2026-09-09

EPSS Evaluated

2026-10-18

NVD

CVE-2026-84386

Affected Vendors & Products

Vendor	Product	Version / Range
fortinet	forticlient	From 7.4.0 (inc) to 7.4.7 (inc)
fortinet	forticlient	7.2

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-283	The product does not properly verify that a critical resource is owned by the proper entity.

Attack-Flow Graph

Executive Summary

This vulnerability is an unverified ownership issue in Fortinet FortiClientWindows versions 7.4.0 through 7.4.7 and all versions of 7.2. It allows improper access control, potentially letting an attacker gain unauthorized access through an unspecified attack vector.

Impact Analysis

An attacker could exploit this to gain elevated privileges or access sensitive data on affected systems. The impact includes potential data breaches or unauthorized system modifications, depending on the attacker's goals.

Compliance Impact

This vulnerability could lead to unauthorized access to personal or sensitive data, violating compliance requirements under GDPR and HIPAA. Organizations using affected FortiClient versions may face legal penalties or data protection violations.

Mitigation Strategies

Update FortiClientWindows to a version that addresses the unverified ownership vulnerability. FortiClientWindows 7.4.0 through 7.4.7 and all versions of 7.2 are affected. Check Fortinet's official advisories for patches.

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