Vulnerability identifier: #VU54847

Vulnerability risk: Low

CVSSv3.1: 6.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-26106

CWE-ID: CWE-78

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
FortiAP
Hardware solutions / Routers & switches, VoIP, GSM, etc
FortiAP-S
Hardware solutions / Routers & switches, VoIP, GSM, etc
FortiAP-W2
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 within the kdbg CLI command. A local user can pass specially crafted input to the affected kdbg CLI command and execute arbitrary OS commands on the system with elevated privileges.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

FortiAP: 6.0.0 - 6.0.6, 6.4.3 - 6.4.5

FortiAP-S: 6.2.0 - 6.2.5, 6.4.0 - 6.4.5, 6.0.0 - 6.0.6

FortiAP-W2: 6.2.0 - 6.2.5, 6.4.0 - 6.4.5, 6.0.0 - 6.0.6

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External links
http://fortiguard.com/advisory/FG-IR-20-210

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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.