Using John the Ripper with a reasonably good wordlist like rockyou.txt :
Because they cannot be reversed, you only have two options if you've lost the password: Cracking (Brute Force/Dictionary Attack): You can use tools like John the Ripper to perform a brute-force attack cisco secret 5 password decrypt
None of these decrypt. All of them guess. Using John the Ripper with a reasonably good
The system creates a random 4-character string called a "salt." The salt ensures that even if two different routers use the exact same password, their resulting hashes will look completely different. key on a console connection) and changing the
key on a console connection) and changing the configuration register to ignore the startup configuration Type 5 vs. Type 7 Comparison Cisco Router Password Decryption - SolarWinds
This type represents an MD5 hash, enhanced with a salt.
A: Most handle only Type 7 passwords. For Type 5, they simply check their precomputed wordlist. Try a strong password—they will fail.