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Fortinet Fortigate 7.2.x / 7.4.x < 7.6.0 NULL Pointer Dereference in httpsd (FG-IR-26-173)

low Nessus Plugin ID 348167

Synopsis

Fortinet Firewall is missing one or more security-related updates.

Description

The version of Fortigate installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the FG-IR-26-173 advisory.

 - A NULL Pointer Dereference vulnerability [CWE-476] in Fortinet FortiOS 7.4 all versions, FortiOS 7.2 all versions may allow an authenticated attacker to crash the httpsd daemon via crafted HTTP requests.
 (CVE-2026-84392)

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

Solution

Upgrade to Fortigate (FortiOS) version 7.6.0 or later. No fix is available within the 7.2.x or 7.4.x branches.

See Also

https://www.fortiguard.com/psirt/FG-IR-26-173

Plugin Details

Severity: Low

ID: 348167

File Name: fortigate_FG-IR-26-173.nasl

Version: 1.1

Type: Local

Family: Firewalls

Published: 9/18/2026

Updated: 9/18/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Low

Score: 1.2

Percentile: 0.01

CVSS v2

Risk Factor: Low

Base Score: 3.3

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

CVSS Score Source: CVE-2026-84392

CVSS v3

Risk Factor: Low

Base Score: 2.7

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

Vulnerability Information

CPE: cpe:/o:fortinet:fortios

Required KB Items: Host/Fortigate/model, Host/Fortigate/version

Patch Publication Date: 9/8/2026

Vulnerability Publication Date: 9/8/2026

Reference Information

CVE: CVE-2026-84392

CWE: 476

IAVA: 2026-A-1004