Vulnerability identifier: #VU54725

Vulnerability risk: Low

CVSSv3.1: 7.7 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-26115

CWE-ID: CWE-78

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
FortiWAN
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Fortinet, Inc

Description

The vulnerability allows a local user to escalate privileges on the system.

The vulnerability exists due to improper input validation when processing certain OS commands. A local unprivileged user can execute arbitrary OS commands with root privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FortiWAN: 4.0.0 - 4.5.7

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External links
http://www.fortiguard.com/psirt/FG-IR-21-069

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.