Best Practices for Least Privilege

Best practice 1

Least privilege is a fundamental security principle about reducing unnecessary access.

NIST defines it as restricting access privileges to the minimum necessary to accomplish assigned tasks.

Instead of giving broad access by default, systems and administrators assign only the permissions needed for the specific role, task, or process.

This helps reduce the impact of mistakes, misuse, and compromised accounts.

Best practice 2

Least privilege matters because excessive access increases security risk.

If an account, app, or process is compromised, limited permissions can reduce how much damage the attacker can do.

A common misconception is that least privilege means making work impossible. In reality, it means giving the right level of access, not no access.

Another misconception is that least privilege only matters for administrators. It applies broadly across users, services, apps, and automation.

Best practice 3

A common misconception is that least privilege means making work impossible. In reality, it means giving the right level of access, not no access.

Another misconception is that least privilege only matters for administrators. It applies broadly across users, services, apps, and automation.

The simplest rule to remember

The best practices around Least Privilege usually make the most sense when they are tied to real-world goals like reliability, security, performance, or clarity.

That is why understanding the purpose of Least Privilege matters as much as memorizing its definition.

Related questions

What to learn next

Sources

• NIST Glossary: least privilege
• NIST SP 800-53 AC-6 Least Privilege