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Fortinet FortiManager Buffer overflow via fgtupdates service (FG-IR-26-098)

high Nessus Plugin ID 301719

Synopsis

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

Description

The version of FortiManager installed on the remote host is prior to tested version. It is, therefore, affected by a vulnerability as referenced in the FG-IR-26-098 advisory.

 - A Stack-based Buffer Overflow vulnerability [CWE-121] in FortiManager fgtupdates service may allow a remote unauthenticated attacker to execute unauthorized commands via crafted requests, if the service is enabled. The success of the attack depends on the ability to bypass the stack protection mechanisms.
 (CVE-2025-54820)

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

Solution

For 6.4.x, see vendor advisory. For 7.2.x, upgrade to FortiManager version 7.2.11 or later. For 7.4.x, upgrade to FortiManager version 7.4.3 or later.

See Also

https://www.fortiguard.com/psirt/FG-IR-26-098

Plugin Details

Severity: High

ID: 301719

File Name: fortimanager_FG-IR-26-098.nasl

Version: 1.1

Type: local

Family: Firewalls

Published: 3/10/2026

Updated: 3/10/2026

Configuration: Enable paranoid mode

Supported Sensors: Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.6

Temporal Score: 5.6

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

CVSS Score Source: CVE-2025-54820

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:H/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:/a:fortinet:fortimanager

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

Exploit Ease: No known exploits are available

Patch Publication Date: 3/10/2026

Vulnerability Publication Date: 3/10/2026

Reference Information

CVE: CVE-2025-54820