A knows that the gold is in the credentialed scan. They can tell you exactly which local privileges are needed for Windows (hint: not Administrator, just Performance Monitor Users group plus certain WMI permissions). They know how to SSH into a Linux box with a custom sudoers file that doesn't break the bank. Expert move: They don’t just scan root . They use a dedicated service account with the lightest possible footprint, and they always test the credentials before hitting “Launch.” 2. Plugin Whispering (Knowing the "Why" Behind the Alert) Nessus returns a result: Plugin 153953 (CVE-2021-44228).
Nessus is just a tool. But in the hands of an expert, it’s not a vulnerability scanner. It’s a . nessus expert
A novice logs it. An intermediate user verifies it. An asks: “Why did this plugin fire? What’s the difference between Plugin 153953 and Plugin 155321? Which one is a false positive?” A knows that the gold is in the credentialed scan