CVE-2019-1734: Cisco FXOS and NX-OS Software Sensitive File Read Information Disclosure Vulnerability

Severity: medium (CVSS 5.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.3% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2019-11-05 · updated 2026-06-17
Weakness: CWE-200

Description

A vulnerability in the implementation of a CLI diagnostic command in Cisco FXOS Software and Cisco NX-OS Software could allow an authenticated, local attacker to view sensitive system files that should be restricted. The attacker could use this information to conduct additional reconnaissance attacks. The vulnerability is due to incomplete role-based access control (RBAC) verification. An attacker could exploit this vulnerability by authenticating to the device and issuing a specific CLI diagnostic command with crafted user-input parameters. An exploit could allow the attacker to perform an arbitrary read of a file on the device, and the file may contain sensitive information. The attacker needs valid device credentials to exploit this vulnerability.

Affected products

Cisco Firepower Extensible Operating System (FXOS): before 2.2.2.91; from 2.3 before 2.3.1.111; from 2.4 before 2.4.1.101 — fixed in 2.2.2.91, 2.3.1.111, 2.4.1.101
Cisco NX-OS: before 6.2\(7\); before 7.0\(3\)i4\(9\); from 7.0\(3\)i7 before 7.0\(3\)i7\(6\); before 6.0\(2\)a4\(1\); from 7.0\(3\)i4 before 7.0\(3\)i4\(9\); from 7.0\(3\) before 7.0\(3\)f3\(5\) — fixed in 4.0\(1a\), 6.0\(2\)a4\(1\), 6.2\(6\), 6.2\(7\), 7.0\(3\)f3\(5\), 7.0\(3\)i4\(9\)

How to fix

Upgrade to a fixed version: Cisco Firepower Extensible Operating System (FXOS) 2.2.2.91, 2.3.1.111, 2.4.1.101; Cisco NX-OS 4.0\(1a\), 6.0\(2\)a4\(1\), 6.2\(6\), 6.2\(7\). Check the vendor advisory for mitigations.

References

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