CVE-2021-40120: OS Command Injection
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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Reference Links
Frequently Asked Questions
What is CVE-2021-40120?
CVE-2021-40120 is a vulnerability in the web-based management interface of certain Cisco Small Business RV Series Routers.
How severe is the vulnerability CVE-2021-40120?
The severity level of CVE-2021-40120 is critical with a CVSS score of 7.2.
What is the impact of CVE-2021-40120?
An authenticated, remote attacker with administrative privileges could inject arbitrary commands into the underlying operating system and execute them with root-level privileges.
Which software products are affected by CVE-2021-40120?
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.
How can I fix CVE-2021-40120?
To fix CVE-2021-40120, Cisco has provided patches and software updates, which should be applied as soon as possible.
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- agent/references
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- agent/weakness
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- agent/last-modified-date
- agent/softwarecombine
- vendor/cisco
- canonical/cisco ios xr
- version/cisco ios xr/4.2.3.06
- canonical/cisco rv016
- canonical/cisco rv042
- canonical/cisco rv042g
- canonical/cisco rv082
- canonical/cisco rv320
- canonical/cisco rv325
- canonical/cisco application extension platform
- version/cisco application extension platform/1.5.1.13