The article already states: > This password allows an attacker to bypass authentication > through SSH and Telnet, as long as they know a valid > username

The article already states: > This password allows an attacker to bypass authentication > through SSH and Telnet, as long as they know a valid > username. If you want to test this issue by hand, telnet or > ssh to a Netscreen device, specify a valid username, and > the backdoor password. If the device is vulnerable, you > should receive an interactive shell with the highest > privileges. The fact that you thanked _jomo for explaining something that effectively quotes almost verbatim what the article tells you indicates you probably didn't bother to read the article. Like with asking help on various forums, it's generally appreciated (or expected, depending on the community) that you do some homework yourself to understand things, state your current understanding, and then ask for confirmation or clarification if your understanding is incorrect. Saying "ELI5 please" comes across as intellectual laziness on your part. If you haven't made any effort to understand an article in plain English (it's no scientific paper we're discussing) then why should others make that effort for you?