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Fortinet FortiClient Arbitrary process termination from exposed minifilter communication port (FG-IR-26-165)

medium Nessus Plugin ID 346901

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Synopsis

remote Windows host is missing one or more security-related updates.

Description

The version of FortiClient installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the FG-IR-26-165 advisory.

 - 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 <insert attack vector here> (CVE-2026-84386)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

For 7.2.x, see vendor advisory. For 7.4.x, upgrade to FortiClient version 7.4.8 or later.

See Also

https://www.fortiguard.com/psirt/FG-IR-26-165

Plugin Details

Severity: Medium

ID: 346901

File Name: forticlient_FG-IR-26-165.nasl

Version: 1.4

Type: Local

Agent: windows

Family: Windows

Published: 9/17/2026

Updated: 9/24/2026

Supported Sensors: Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Low

Score: 3.5

Percentile: 51.53

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:L/AC:L/Au:M/C:N/I:P/A:C

CVSS Score Source: CVE-2026-84386

CVSS v3

Risk Factor: Medium

Base Score: 5.1

Temporal Score: 4.5

Vector: CVSS:3.0/AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:L/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:fortinet:forticlient

Required KB Items: installed_sw/FortiClient

Exploit Ease: No known exploits are available

Patch Publication Date: 9/8/2026

Vulnerability Publication Date: 9/8/2026

Reference Information

CVE: CVE-2026-84386

IAVA: 2026-A-0996