What is CVE-2021-1421?

CVE-2021-1421 is a vulnerability in Cisco Enterprise NFV Infrastructure Software (NFVIS) that allows an authenticated, local attacker to perform a command injection attack on an affected device.

What is the severity of CVE-2021-1421?

CVE-2021-1421 has a severity rating of 7.8 (high).

How does CVE-2021-1421 affect Cisco Enterprise NFV Infrastructure Software?

CVE-2021-1421 affects Cisco Enterprise NFV Infrastructure Software (NFVIS) versions up to and including 4.5.1.

How can an attacker exploit CVE-2021-1421?

An attacker can exploit CVE-2021-1421 by injecting malicious commands into a configuration command in Cisco Enterprise NFV Infrastructure Software (NFVIS).

Is there a fix for CVE-2021-1421?

Yes, Cisco has released a security advisory with information on how to mitigate this vulnerability. Please refer to the Cisco Security Advisory for detailed guidance.

Vulnerability/
CVE-2021-1421

high

7.8

CWE

78 77

6/5/2021

8/11/2024

CVE-2021-1421: Cisco Enterprise NFV Infrastructure Software Command Injection Vulnerability

First published: Thu May 06 2021(Updated: )

A vulnerability in Cisco Enterprise NFV Infrastructure Software (NFVIS) could allow an authenticated, local attacker to perform a command injection attack on an affected device. The vulnerability is due to insufficient validation of user-supplied input to a configuration command. An attacker could exploit this vulnerability by including malicious input during the execution of this command. A successful exploit could allow a non-privileged attacker authenticated in the restricted CLI to execute arbitrary commands on the underlying operating system (OS) with root privileges.

Credit: ykramarz@cisco.com

Affected Software	Affected Version	How to fix
Cisco Enterprise NFV Infrastructure Software	<4.5.1

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Reference Links

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nfvis-cmdinj-DkFjqg2j

Frequently Asked Questions

What is CVE-2021-1421?
CVE-2021-1421 is a vulnerability in Cisco Enterprise NFV Infrastructure Software (NFVIS) that allows an authenticated, local attacker to perform a command injection attack on an affected device.
What is the severity of CVE-2021-1421?
CVE-2021-1421 has a severity rating of 7.8 (high).
How does CVE-2021-1421 affect Cisco Enterprise NFV Infrastructure Software?
CVE-2021-1421 affects Cisco Enterprise NFV Infrastructure Software (NFVIS) versions up to and including 4.5.1.
How can an attacker exploit CVE-2021-1421?
An attacker can exploit CVE-2021-1421 by injecting malicious commands into a configuration command in Cisco Enterprise NFV Infrastructure Software (NFVIS).
Is there a fix for CVE-2021-1421?
Yes, Cisco has released a security advisory with information on how to mitigate this vulnerability. Please refer to the Cisco Security Advisory for detailed guidance.

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