Understanding CVSS Scores: When Should You Panic?
Not all vulnerabilities are created equal. A score of 9.8 sounds terrifying, but if it requires physical access to the server, are you really at risk? Let's break down how to read the Common Vulnerability Scoring System.
Low (0.1 - 3.9)
Usually hard to exploit or has minimal impact. Patch during your regular maintenance cycle.
Medium (4.0 - 6.9)
Requires specific conditions (like a user clicking a link). Audit these, but don't wake up at 3 AM.
High (7.0 - 8.9)
Significant risk. Attackers can likely steal data or interrupt service. Patch within 7 days.
Critical (9.0 - 10.0)
Remote Code Execution (RCE) is likely. Drop everything and patch immediately.
The "Vector String" Matters
You will often see a string like AV:N/AC:L/PR:N/UI:N. This is the DNA of the attack.
- AV:N Network: The attack can be launched remotely (Dangerous).
- AC:L Access Complexity Low: Easy to pull off.
- PR:N Privileges None: No login required. Anyone can hack you.
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