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Cybersecurity Glossary

What is Least Privilege?

Least privilege is the security principle of giving every user, account, and system only the minimum access required to do its job. Reducing permissions reduces the blast radius if a single credential is stolen or a device is compromised.

Blocks 99% of password attacks
Required by most cyber insurance
Core to SOC 2, HIPAA, PCI
How It Works

How Least Privilege works

Three-step view of how it operates in practice.

1

Inventory

Identify every account, role, and system. Document what it currently has access to.

2

Right-size

For each role, define the minimum permissions needed. Remove everything else. Convert admin-by-default setups to just-in-time.

3

Review

Privileges drift. Quarterly access reviews, automated recertification, and offboarding discipline keep the baseline clean.

Least Privilege Variants

Where least privilege applies

A clear breakdown of the common variants.

Scope

End-user accounts

Standard users shouldn’t be local admins on their laptops.

Most common

Admin accounts

Time-based one-time codes from an app like Microsoft Authenticator or Google Authenticator. Offline-capable and phishing-resistant against many attacks.

Convenient

Service accounts

The user approves a sign-in with a tap on their phone. Easy to use but vulnerable to MFA fatigue attacks — always pair with number matching.

Strongest

Applications

FIDO2 keys like YubiKey, or device-bound passkeys. Phishing-resistant by design — the key will not authenticate against a fake domain.

Why It Matters

Why Least Privilege matters for SMBs

Least privilege is the security principle of giving every user, account, and system only the minimum access required to do its job.

74%
of breaches involve the abuse of privileged credentials
Source: Verizon DBIR, 2024
Pitfalls

Common Least Privilege mistakes

  • Giving everyone admin to "make things easier"It makes attacks easier too. Standard-user accounts are the baseline.
  • Never reviewing permissionsAdmins, finance, and anyone with access to money or sensitive data should use an app or hardware key — never SMS alone.
  • Single shared admin accountBreaks auditability and blocks offboarding. Every admin needs a named account.
  • Service accounts with god-modeApplications get scoped permissions, never Global Admin.
Common Questions

Least Privilege frequently asked questions

RBAC is one way to implement least privilege. Least privilege is the principle; RBAC, attribute-based access (ABAC), and just-in-time access are techniques that implement it.
Pick one system (usually Microsoft 365) and one role (usually Global Admin). Move day-to-day work to standard accounts, keep admin accounts for admin tasks only. Expand from there.
Rather than granting admin permissions permanently, users request elevation when they need it. Access is granted for a short window and logged. Reduces standing privilege without slowing work.
Done poorly, yes. Done well, users don’t notice it day-to-day because their regular access is unchanged — only elevation events require extra steps.
Have a documented recovery process before it happens. Typically an administrator verifies the user's identity through an out-of-band channel, temporarily disables MFA, and re-enrolls the user with a new device. Backup codes or a secondary security key reduce downtime.
Related Services

LogicalNet services related to MFA

Identity & Access Protection Primary

MFA enforcement, conditional access, least privilege, and identity monitoring.

Email Security

Phishing defense, account-takeover monitoring, and secure email gateways.
Related Terms

Related glossary terms

PAM

Policies that adapt to device, location, and risk signals.

IAM

A security model that verifies every request as if it came from an open network.

Least Privilege

Give users only the access they need — nothing more.

Conditional Access

FIDO2 keys and passkeys that cannot be proxied or replayed.
Identity & Access

Privileged access sprawl?

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