First published: Thu Nov 04 2021(Updated: )
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.
Credit: ykramarz@cisco.com
Affected Software | Affected Version | How to fix |
---|---|---|
Cisco IOS XR | =4.2.3.06 | |
Cisco Rv016 | ||
Cisco Rv042 | ||
Cisco Rv042g | ||
Cisco Rv082 | ||
Cisco RV320 | ||
Cisco RV325 | ||
Cisco Application Extension Platform | =1.5.1.13 |
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CVE-2021-40120 is a vulnerability in the web-based management interface of certain Cisco Small Business RV Series Routers.
The severity level of CVE-2021-40120 is critical with a CVSS score of 7.2.
An authenticated, remote attacker with administrative privileges could inject arbitrary commands into the underlying operating system and execute them with root-level privileges.
Certain Cisco Small Business RV Series Routers, Cisco IOS XR 4.2.3.06, and Cisco Application Extension Platform 1.5.1.13 are affected by CVE-2021-40120.
To fix CVE-2021-40120, Cisco has provided patches and software updates, which should be applied as soon as possible.