CVE-2021-40120 MEDIUM

CVE-2021-40120: Cisco Small Business RV Series Routers Command Injection Vulnerability

Vendor Cisco
Product Cisco Small Business RV Series Router Firmware
Weakness CWE-20 · Input validation
Published November 4, 2021
Last update November 7, 2024

CVSS base score

6.5/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity High

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

What the vulnerability does

01Description

A vulnerability in the web-based management interface of certain Cisco Small Business RV Series Routers could allow an authenticated, remote attacker with administrative privileges to inject arbitrary commands into the underlying operating system and execute them using root-level privileges. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by sending malicious input to a specific field in the web-based management interface of an affected device. A successful exploit could allow the attacker to execute arbitrary commands on the underlying Linux operating system as a user with root-level privileges.

Key dates

02Disclosure timeline

November 4, 2021 CVE published
November 7, 2024 Record updated