Cisco NX-OS up to 10.6(3s) Python Interpreter sandbox

Summaryinfo

A vulnerability, which was classified as very critical, has been found in Cisco NX-OS. Affected is an unknown function of the component Python Interpreter. The manipulation leads to sandbox. This vulnerability is listed as CVE-2026-20032. The attack must be carried out locally. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as very critical, has been found in Cisco NX-OS. This issue affects an unknown functionality of the component Python Interpreter. The manipulation with an unknown input leads to a sandbox vulnerability. Using CWE to declare the problem leads to CWE-265. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at sec.cloudapps.cisco.com. The identification of this vulnerability is CVE-2026-20032 since 10/08/2025. The exploitation is known to be easy. An attack has to be approached locally. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 10/07/2026). MITRE ATT&CK project uses the attack technique T1611 for this issue.

Upgrading eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Router Operating System

Vendor

• Cisco

Name

• NX-OS

Version

• 7.3(0)D1(1)
• 7.3(0)DX(1)
• 7.3(0)DY(1)
• 7.3(1)D1(1)
• 7.3(1)DY(1)
• 7.3(2)D1(1)
• 7.3(2)D1(1d)
• 7.3(2)D1(2)
• 7.3(2)D1(3)
• 7.3(2)D1(3a)
• 7.3(3)D1(1)
• 7.3(4)D1(1)
• 7.3(5)D1(1)
• 7.3(6)D1(1)
• 7.3(7)D1(1)
• 7.3(8)D1(1)
• 7.3(9)D1(1)
• 8.1(1)
• 8.1(1a)
• 8.1(1b)
• 8.1(2)
• 8.1(2a)
• 8.2(1)
• 8.2(2)
• 8.2(3)
• 8.2(4)
• 8.2(5)
• 8.2(6)
• 8.2(7)
• 8.2(7a)
• 8.2(8)
• 8.2(9)
• 8.2(10)
• 8.2(11)
• 8.3(1)
• 8.3(2)
• 8.4(1)
• 8.4(1a)
• 8.4(2)
• 8.4(2a)
• 8.4(2b)
• 8.4(2c)
• 8.4(2d)
• 8.4(2e)
• 8.4(2f)
• 8.4(3)
• 8.4(4)
• 8.4(4a)
• 8.4(5)
• 8.4(6)
• 8.4(6a)
• 8.4(7)
• 8.4(8)
• 8.4(9)
• 8.4(10)
• 8.4(11)
• 8.4(12)
• 8.4(13)
• 8.5(1)
• 9.2(1)
• 9.2(1a)
• 9.2(2)
• 9.2(2t)
• 9.2(2v)
• 9.2(3)
• 9.2(3y)
• 9.2(4)
• 9.3(1)
• 9.3(1z)
• 9.3(2)
• 9.3(2a)
• 9.3(3)
• 9.3(4)
• 9.3(5)
• 9.3(5w)
• 9.3(6)
• 9.3(7)
• 9.3(7a)
• 9.3(7k)
• 9.3(8)
• 9.3(9)
• 9.3(10)
• 9.3(11)
• 9.3(12)
• 9.3(13)
• 9.3(14)
• 9.3(15)
• 9.3(16)
• 9.3(17)
• 9.4(1)
• 9.4(1a)
• 9.4(2)
• 9.4(2a)
• 9.4(3)
• 9.4(3a)
• 9.4(3b)
• 9.4(4)
• 9.4(5)
• 10.3(1)
• 10.3(2)
• 10.3(3)
• 10.3(3o)
• 10.3(3p)
• 10.3(3q)
• 10.3(3r)
• 10.3(3w)
• 10.3(3x)
• 10.3(4)
• 10.3(4a)
• 10.3(4g)
• 10.3(4h)
• 10.3(5)
• 10.3(6)
• 10.3(7)
• 10.3(8)
• 10.3(9)
• 10.3(99w)
• 10.3(99x)
• 10.4(1)
• 10.4(2)
• 10.4(3)
• 10.4(4)
• 10.4(4g)
• 10.4(5)
• 10.4(6)
• 10.4(7)
• 10.5(1)
• 10.5(2)
• 10.5(3)
• 10.5(3e)
• 10.5(3o)
• 10.5(3p)
• 10.5(3s)
• 10.5(3t)
• 10.5(4)
• 10.5(5)
• 10.6(1)
• 10.6(1s)
• 10.6(2)
• 10.6(2n)
• 10.6(2s)
• 10.6(3)
• 10.6(3s)

License

• commercial

Website

• Vendor: https://www.cisco.com/

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Entryinfo

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