Cisco Device Default Password

critical Nessus Plugin ID 23938
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The remote device has a default factory password set.


The remote Cisco router has a default password set. A remote, unauthenticated attacker can exploit this to gain administrative access.


Change the Cisco device default password via the command 'enable secret'.

Plugin Details

Severity: Critical

ID: 23938

File Name: cisco_default_pw.nasl

Version: 1.47

Type: remote

Family: CISCO

Published: 12/23/2006

Updated: 9/2/2020

Dependencies: find_service2.nasl, ssh_get_info.nasl

Risk Information

CVSS Score Source: CVE-1999-0508

CVSS Score Rationale: Av:n is justified since the plugin tries to login via ssh or telnet. while the nvd score implies the the device is only accessible locally, that's not explicitly specified in the cve description: an account on a router, firewall, or other network device has a default, null, blank, or missing password. it is a reasonable assumption that if the plugin can log in with one of the sets of credentials attempted in the plugin, it can own the device (hence cia complete instead of partial).


Risk Factor: Critical

Score: 9.7


Risk Factor: Critical

Base Score: 10

Temporal Score: 7.7

Vector: AV:N/AC:L/Au:N/C:C/I:C/A:C

Temporal Vector: E:U/RL:TF/RC:C


Risk Factor: Critical

Base Score: 9.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Vulnerability Information

CPE: cpe:/o:cisco

Excluded KB Items: global_settings/supplied_logins_only

Exploit Ease: No exploit is required

Vulnerability Publication Date: 1/1/1999

Reference Information

CVE: CVE-1999-0508