Cisco’s password remains one of the most common security features found in legacy networking environments. While it was once considered robust, modern computing power has made it increasingly vulnerable to Cisco IOS enable secret Type 5 password crackers .
Cisco has recognized the weaknesses in Type 5 and introduced stronger alternatives. Network administrators must migrate away from Type 5 to protect configurations.
While salted, the lack of computational cost (iterations) makes them trivial to crack for anyone who gains access to a configuration file. Immediate migration to Type 8 (SHA-256) or Type 9 (SCRYPT) is required to maintain the integrity of network device access controls.