Rapid7 Vulnerability & Exploit Database

Cisco IOS HTTP Unauthorized Administrative Access

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Cisco IOS HTTP Unauthorized Administrative Access



This module exploits a vulnerability in the Cisco IOS HTTP Server. By sending a GET request for "/level/num/exec/..", where num is between 16 and 99, it is possible to bypass authentication and obtain full system control. IOS 11.3 -> 12.2 are reportedly vulnerable. This module tested successfully against a Cisco 1600 Router IOS v11.3(11d).


  • aushack <patrick@osisecurity.com.au>
  • hdm <x@hdm.io>


Module Options

To display the available options, load the module within the Metasploit console and run the commands 'show options' or 'show advanced':

msf > use auxiliary/scanner/http/cisco_ios_auth_bypass
msf auxiliary(cisco_ios_auth_bypass) > show actions
msf auxiliary(cisco_ios_auth_bypass) > set ACTION < action-name >
msf auxiliary(cisco_ios_auth_bypass) > show options
    ...show and set options...
msf auxiliary(cisco_ios_auth_bypass) > run 

Time is precious, so I don’t want to do something manually that I can automate. Leveraging the Metasploit Framework when automating any task keeps us from having to re-create the wheel as we can use the existing libraries and focus our efforts where it matters.

– Jim O’Gorman | President, Offensive Security