Fortinet Fortigate Heap-based buffer overflow in cw_acd daemon (FG-IR-25-084)

critical Nessus Plugin ID 282655

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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-25-084 advisory.

- A heap-based buffer overflow 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 6.4.0 through 6.4.16, FortiSwitchManager 7.2.0 through 7.2.6, FortiSwitchManager 7.0.0 through 7.0.5 allows attacker to execute unauthorized code or commands via specially crafted packets (CVE-2025-25249)

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

Solution

For 7.0.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.

Plugin Details

Severity: Critical

ID: 282655

File Name: fortigate_FG-IR-25-084.nasl

Version: 1.2

Type: local

Family: Firewalls

Published: 1/13/2026

Updated: 1/19/2026

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2025-25249

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

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

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

Vulnerability Information

CPE: cpe:/o:fortinet:fortios

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

Exploit Ease: No known exploits are available

Patch Publication Date: 1/13/2026

Vulnerability Publication Date: 1/13/2026

Reference Information

CVE: CVE-2025-25249

Detections

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