#VU57956 Command Injection in Cisco Systems, Inc products - CVE-2021-40120

Vulnerability identifier: #VU57956

Vulnerability risk: Low

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Clear]

CVE-ID: CVE-2021-40120

CWE-ID: CWE-77

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Cisco RV016 Multi-WAN VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco RV042 Dual WAN VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco RV042G Dual Gigabit WAN VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Cisco RV082 Dual WAN VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Small Business RV320 Dual Gigabit WAN VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc
Small Business RV325 Dual Gigabit WAN VPN Router
Hardware solutions / Routers & switches, VoIP, GSM, etc

Vendor: Cisco Systems, Inc

Description

The vulnerability allows a remote user to execute arbitrary commands on the target system.

The vulnerability exists due to improper input validation in the web-based management interface. A remote administrator can pass specially crafted data to the application and execute arbitrary commands on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Cisco RV016 Multi-WAN VPN Router: All versions

Cisco RV042 Dual WAN VPN Router: All versions

Cisco RV042G Dual Gigabit WAN VPN Router: All versions

Cisco RV082 Dual WAN VPN Router: All versions

Small Business RV320 Dual Gigabit WAN VPN Router: All versions

Small Business RV325 Dual Gigabit WAN VPN Router: All versions

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External links
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sbrv-cmdinjection-Z5cWFdK

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated privileged user via the Internet.

Is there known malware, which exploits this vulnerability?

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