CVE-2026-20032: Improper Isolation or Compartmentalization in Cisco Cisco NX-OS Software

This vulnerability in Cisco NX-OS Software's Python interpreter is caused by insufficient validation of user input, which allows an authenticated local attacker with low privileges to escape the Python sandbox environment. By exploiting specific functions within the interpreter, the attacker can execute arbitrary commands on the underlying operating system with the same privileges as the authenticated user. The CVSS v3.1 base score is 4.4, reflecting a medium severity with local attack vector, low complexity, and no user interaction required.

An attacker who is authenticated locally with low privileges could exploit this vulnerability to escape the Python sandbox and execute arbitrary commands on the underlying operating system with their own privileges. This could lead to unauthorized access to system resources and potential further compromise depending on the privileges of the authenticated user. There is no indication of impact on confidentiality beyond limited access, nor integrity or availability beyond low impact.

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. In the absence of an official fix or advisory, restrict local access to trusted users only and monitor for suspicious activity involving the Python interpreter within Cisco NX-OS. Follow Cisco's guidance once available.