RCE in Cisco Application Extension Platform

CVE-2021-40120

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.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

EPSS: 0.019 (78.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2021-40120?
CVE-2021-40120 is a medium-severity vulnerability in Cisco Application Extension Platform, classified under Improper Input Validation. CVSS score: 6.5/10. Published 2021-11-04.
How severe is CVE-2021-40120?
Medium severity. CVSS v3 base score is 6.5 out of 10.