Fortinet FortiOS Hard-Coded Cryptographic Key (FG-IR-21-051)

high Nessus Plugin ID 156755
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The remote host is affected by a hard-coded cryptographic key vulnerability.


The remote host is running a version of FortiOS prior to 5.6.13, 6.0.x prior or equal to 6.0.12, 6.2.x prior or equal to 6.2.8, or 6.4.x prior or equal to 6.4.5, FortiOS-6K7K version prior to 6.2.6 and 6.4.2. It is, therefore, affected by a hard-coded cryptographic key vulnerability in FortiOS SSLVPN may allow an attacker to retrieve the key by reverse engineering.

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


See vendor advisory.

See Also

Plugin Details

Severity: High

ID: 156755

File Name: fortios_FG-IR-21-051.nasl

Version: 1.2

Type: local

Family: Firewalls

Published: 1/14/2022

Updated: 1/17/2022

Dependencies: fortinet_version.nbin

Risk Information

CVSS Score Source: CVE-2021-26108


Risk Factor: Medium

Score: 4.4


Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

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

Temporal Vector: E:U/RL:OF/RC:C


Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/o:fortinet:fortios

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

Exploit Ease: No known exploits are available

Patch Publication Date: 12/7/2021

Vulnerability Publication Date: 12/7/2021

Reference Information

CVE: CVE-2021-26108

IAVA: 2021-A-0574