Detections
Analytics

Fortinet FortiAnalyzer DoS due to unsafe function in signal handler (FG-IR-26-137)

medium Nessus Plugin ID 314326

Synopsis

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

Description

The version of FortiAnalyzer installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the FG-IR-26-137 advisory.

 - A use of potentially Dangerous Function vulnerability [CWE-676] in FortiAnalyzer and FortiManager API may allow an authenticated attacker to cause a system hang via multiple specially crafted HTTP requests causing crashes. This happens if internal locks are aligned, which is out of control of the attacker.
 (CVE-2025-67604)

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 FortiAnalyzer version 7.4.9 or later. For 7.6.x, upgrade to FortiAnalyzer version 7.6.5 or later.

See Also

https://www.fortiguard.com/psirt/FG-IR-26-137

Plugin Details

Severity: Medium

ID: 314326

File Name: fortianalyzer_FG-IR-26-137.nasl

Version: 1.1

Type: Local

Family: Firewalls

Published: 5/12/2026

Updated: 5/12/2026

Supported Sensors: Nessus

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 4.9

Temporal Score: 3.6

Vector: CVSS2#AV:N/AC:H/Au:S/C:N/I:N/A:C

CVSS Score Source: CVE-2025-67604

CVSS v3

Risk Factor: Medium

Base Score: 5.3

Temporal Score: 4.6

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

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

Vulnerability Information

CPE: cpe:/a:fortinet:fortianalyzer

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

Exploit Ease: No known exploits are available

Patch Publication Date: 5/12/2026

Vulnerability Publication Date: 5/12/2026

Reference Information

CVE: CVE-2025-67604