CVE-2019-1779: Cisco FXOS and NX-OS Software Command Injection Vulnerability

Severity: medium (CVSS 6.7 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-05-15 · updated 2026-06-17
Weakness: CWE-77

Description

A vulnerability in the CLI of Cisco FXOS Software and Cisco NX-OS Software could allow an authenticated, local attacker to execute arbitrary commands on the underlying operating system of an affected device with elevated privileges. The vulnerability is due to insufficient validation of arguments passed to certain CLI commands. An attacker could exploit this vulnerability by including malicious input as the argument of an affected command. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system with elevated privileges. An attacker would need valid device credentials to exploit this vulnerability.

Affected products

Cisco Firepower Extensible Operating System (FXOS): before 2.4.1.101 — fixed in 2.4.1.101
Cisco NX-OS: from 5.2 before 6.2\(25\); from 7.3 before 8.1\(1b\); from 8.2 before 8.3\(1\); before 7.0\(3\)i4\(9\); from 7.0\(3\)i7 before 7.0\(3\)i7\(4\); from 7.0\(3\) before 7.0\(3\)f3\(5\) — fixed in 6.2\(22\), 6.2\(25\), 7.0\(3\)f3\(5\), 7.0\(3\)i4\(9\), 7.0\(3\)i7\(4\), 7.3\(3\)d1\(1\)

How to fix

Upgrade to a fixed version: Cisco Firepower Extensible Operating System (FXOS) 2.4.1.101; Cisco NX-OS 6.2\(22\), 6.2\(25\), 7.0\(3\)f3\(5\), 7.0\(3\)i4\(9\). Check the vendor advisory for mitigations.

References

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