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Fortinet Fortigate Missing Authentication for critical function in CAPWAP daemon (FG-IR-26-125)

medium Nessus Plugin ID 306464

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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-26-125 advisory.

 - A missing authentication for critical function vulnerability in Fortinet FortiOS 7.6.0 through 7.6.3, FortiOS 7.4.0 through 7.4.8, FortiOS 7.2.0 through 7.2.11, FortiOS 7.0.0 through 7.0.17, FortiOS 6.4 all versions, FortiOS 6.2.9 through 6.2.17 allows attacker to execute unauthorized code or commands via specially crafted packets. (CVE-2025-53847)

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

Solution

For 6.2.x / 6.4.x, see vendor advisory. For 7.0.x, upgrade to Fortigate version 7.0.18 or later. For 7.2.x, upgrade to Fortigate version 7.2.12 or later. For 7.4.x, upgrade to Fortigate version 7.4.9 or later. For 7.6.x, upgrade to Fortigate version 7.6.4 or later.

See Also

https://www.fortiguard.com/psirt/FG-IR-26-125

Plugin Details

Severity: Medium

ID: 306464

File Name: fortigate_FG-IR-26-125.nasl

Version: 1.1

Type: Local

Family: Firewalls

Published: 4/14/2026

Updated: 4/14/2026

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

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

CVSS Score Source: CVE-2025-53847

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: cpe:/o:fortinet:fortios

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

Exploit Ease: No known exploits are available

Patch Publication Date: 4/14/2026

Vulnerability Publication Date: 4/14/2026

Reference Information

CVE: CVE-2025-53847