CVE-2019-1730: Cisco NX-OS

Medium severity, CVSS 6.7. EPSS: 0.4% chance of exploitation in the next 30 days.

A vulnerability in the Bash shell implementation for Cisco NX-OS Software could allow an authenticated, local attacker to bypass the limited command set of the restricted Guest Shell and execute commands at the privilege level of a network-admin user outside of the Guest Shell. The attacker must authenticate with valid administrator device credentials. The vulnerability is due to the incorrect implementation of a CLI command that allows a Bash command to be incorrectly invoked on the Guest Shell CLI. An attacker could exploit this vulnerability by authenticating to the device and entering a crafted command at the Guest Shell prompt. A successful exploit could allow the attacker to issue commands that should be restricted by a Guest Shell account.

Affected products

• Cisco NX-OS: from 7.0\(3\)i4, before 7.0\(3\)i4\(9\) (fixed in 7.0\(3\)i4\(9\)); from 7.0\(3\)i7, before 7.0\(3\)i7\(4\) (fixed in 7.0\(3\)i7\(4\)); from 8.1, before 8.3\(1\) (fixed in 8.3\(1\)); from 7.0\(3\), before 7.0\(3\)f3\(5\) (fixed in 7.0\(3\)f3\(5\))

Published 2019-05-15. Last modified 2026-06-17.