Router# show running-config | include password|secret\n<\/code><\/pre>\nOr view specific access lines:<\/p>\n
Router# show running-config | section line|username\n<\/code><\/pre>\nExamine the numeral immediately following the password<\/code> or secret<\/code> keyword:
\n* Type 0:<\/strong> Unencrypted cleartext (e.g., password MySecretPassword<\/code>).
\n* Type 7:<\/strong> Weakly obfuscated using a reversible Vigen\u00e8re-based cipher (e.g., password 7 0822455B0A0D050208<\/code>).
\n* Type 5, 8, or 9:<\/strong> One-way cryptographic hashes using MD5, PBKDF2 with SHA-256, or Scrypt (e.g., secret 5 $1$mERr$...<\/code> or secret 9 $9$vX...<\/code>).<\/p>\n<\/span>Step 2: Decrypt Type 7 Passwords Directly in Cisco IOS<\/span><\/h3>\nType 7 encryption created by the service password-encryption<\/code> command is designed to prevent shoulder surfing, not to provide true cryptographic security. You can decode it instantly without external tools by leveraging the router’s native key chain<\/code> feature:<\/p>\n\n- Enter global configuration mode:
\ntext
\nRouter# configure terminal<\/code><\/li>\n- Create a temporary decryption key chain:
\ntext
\nRouter(config)# key chain DECRYPT_TEMP
\nRouter(config-keychain)# key 1<\/code><\/li>\n- Paste the Type 7 encrypted hash into the key-string command:
\ntext
\nRouter(config-keychain-key)# key-string 7 0822455B0A0D050208
\nRouter(config-keychain-key)# end<\/code><\/li>\n- Display the key chain to view the decoded cleartext password:
\ntext
\nRouter# show key chain DECRYPT_TEMP<\/code>
\nThe output will display the original unencrypted password in the key-string<\/code> field.<\/li>\n- Remove the temporary key chain to maintain security:
\ntext
\nRouter# configure terminal
\nRouter(config)# no key chain DECRYPT_TEMP
\nRouter(config)# end<\/code><\/li>\n<\/ol>\n<\/span>Step 3: Handling Irreversible Hashes (Type 5, 8, and 9)<\/span><\/h3>\nModern enterprise configurations protect privileged access using the enable secret<\/code> and username <user> secret<\/code> directives, which generate irreversible hashes. These cannot be reverse-engineered or decrypted through Cisco IOS. If a password is saved as Type 5, 8, or 9 and you do not know the cleartext value, you cannot recover it; you must overwrite it with a new secret using elevated privileges or complete a password bypass procedure.<\/p>\nIf you are working with a graphical interface rather than the CLI\u2014such as on Cisco Small Business hardware\u2014recovering administrative and wireless credentials follows an entirely different workflow.<\/p>\n
\n<\/span>Finding Wi-Fi and Admin Credentials via Cisco Small Business Web Interface<\/span><\/h2>\nCisco Small Business (RV Series) and Cisco Business (CB Series) routers manage settings primarily through an embedded graphical web utility. If you already have access to an authenticated session or a managed workstation on the LAN, you can look up network keys and review administrative account settings.<\/p>\n
<\/span>Step 1: Connect to the Management Utility<\/span><\/h3>\n\n- Connect your computer to one of the router’s local Ethernet LAN ports using an RJ-45 cable, or join the current Wi-Fi network.<\/li>\n
- Open a browser and navigate to your router’s default gateway IP address (typically
https:\/\/192.168.1.1<\/code>).<\/li>\n- Log in using your current administrative user credentials.<\/li>\n<\/ol>\n
<\/span>Step 2: Retrieve the Wi-Fi Security Key<\/span><\/h3>\n\n- In the left-hand navigation tree, go to Wireless<\/strong> > Basic Settings<\/strong> or Wireless<\/strong> > Radio \/ SSID Settings<\/strong> (menu names vary slightly by firmware generation).<\/li>\n
- Select the active SSID from the list and click Edit<\/strong> (or expand the Security Details<\/strong> section).<\/li>\n
- Locate the field labeled WPA\/WPA2\/WPA3 Pre-Shared Key<\/strong> or Network Key<\/strong>.<\/li>\n
- Check the box labeled Show Password<\/strong> or Unmask<\/strong>. The current Wi-Fi password will display in plain text.<\/li>\n<\/ol>\n
<\/span>Step 3: Locate and Update Administrative Passwords<\/span><\/h3>\n\n- Navigate to System Management<\/strong> > User Accounts<\/strong> (or Administration<\/strong> > User Accounts<\/strong>).<\/li>\n
- The interface displays the configured administrative usernames (e.g.,
cisco<\/code>, admin<\/code>).<\/li>\n- For security compliance, Cisco web utilities do not expose existing administrative account passwords in cleartext. If the administrative password is unknown, highlight the target user, select Edit<\/strong>, input a new password into the designated fields, and click Apply<\/strong> to overwrite it.<\/li>\n<\/ol>\n
When you do not have administrative web access, or if you are locked out of an enterprise Cisco IOS router entirely, physical console intervention using the ROMmon recovery procedure is required.<\/p>\n
\n<\/span>Cisco IOS Password Recovery via ROMmon (Preserving Configuration)<\/span><\/h2>\nOn enterprise Cisco IOS and IOS XE routers, you can bypass an unknown enable<\/code> or administrative password without losing your existing configuration. This procedure alters the software configuration register to instruct the router to ignore NVRAM during startup, allowing you to enter privileged mode and set a new password.<\/p>\n<\/span>Required Hardware<\/span><\/h3>\n\n- A dedicated rollover console cable (RJ-45 to DB9\/USB or direct mini-USB\/USB-C console).<\/li>\n
- A terminal client (e.g., PuTTY, SecureCRT, Tera Term) set to serial parameters: 9600 baud, 8 data bits, no parity, 1 stop bit, no flow control (9600-8-N-1)<\/strong>.<\/li>\n<\/ul>\n
<\/span>Step 1: Establish Console Access and Issue the Break Signal<\/span><\/h3>\n\n- Connect the console cable between your PC and the router’s Console<\/strong> port.<\/li>\n
- Power cycle the router using the power switch or by unplugging the power cord, then reconnect it.<\/li>\n
- Within the first 60 seconds of boot, send the terminal Break<\/strong> signal (e.g., press
Ctrl + Break<\/code> in PuTTY, or Alt + B<\/code> in Tera Term).<\/li>\n- The boot sequence halts, presenting the ROM monitor prompt:
\ntext
\nrommon 1 ><\/code><\/li>\n<\/ol>\n<\/span>Step 2: Modify the Configuration Register to 0x2142<\/span><\/h3>\n\n- Instruct the router to bypass the startup configuration stored in NVRAM:
\ntext
\nrommon 1 > confreg 0x2142<\/code><\/li>\n- Reboot the router:
\ntext
\nrommon 2 > reset<\/code>
\n(Note: On certain IOS XE platforms, type boot<\/code> instead of reset<\/code>.)<\/em><\/li>\n<\/ol>\n<\/span>Step 3: Load and Modify the Existing Configuration<\/span><\/h3>\n\n- When prompted:
Would you like to enter the initial configuration dialog? [yes\/no]:<\/code>, type