User Access Control Best Practices: Getting It Right From the Start

User access is one of the most underestimated – and most exploited – aspects of cybersecurity. Whether it’s a forgotten account that no one shut down, an overly generous admin login, or a reused password that turns out to be the weakest link, access controls are often the quiet culprits behind many data breaches. Done properly, user access management can seriously reduce your risk profile. Done poorly, it can undo even your best technical defences.

This article walks through the key principles of user access control best practices, why they matter, and how to apply them in a way that’s both practical and Cyber Essentials-compliant.

Start with separation: Admin vs user

The golden rule is simple: no one should use an administrator account for day-to-day work. Browsing, emailing, even document editing – all of this should happen through standard user accounts. Admin accounts should be reserved strictly for system-level tasks like installing software or managing user privileges.

Here’s why: if malware or a phishing attack lands on a system where the user is logged in with admin privileges, the attacker gets full system access. It’s like handing over your house keys and alarm code. Keeping roles separate is one of the simplest ways to limit the impact of a potential breach.

Even sole traders or small teams should create separate admin and user accounts on every machine.

The principle of least privilege

Give users just enough access to do their job – and no more. This principle is known as the “least privilege model,” and it’s a cornerstone of secure user access. It means:

  • Employees only have access to the data and systems necessary for their role
  • Permissions are reviewed regularly (especially when someone changes roles)
  • Former staff accounts are disabled or deleted promptly

This doesn’t just protect against malicious insiders (although that risk is real). It also guards against mistakes – accidental deletions, incorrect settings, or someone clicking the wrong thing in a system they didn’t really need access to.

Shared accounts? Avoid them

Shared accounts may seem like a shortcut in smaller teams, but they introduce a whole list of problems:

  • You can’t track who did what, which kills accountability
  • Passwords are more likely to be reused, guessed, or shared outside the team
  • If one person leaves, you have to reset the account details for everyone

User access control best practices dictate that every user should have their own unique login. If access needs to be shared, look at group-based access roles or audit-trail-enabled collaboration tools.

Create and track accounts properly

User account creation should be a structured process, even in small organisations. For example:

  • Only create an account once onboarding steps are completed
  • Assign permissions based on role, not individual request
  • Record who has admin access – and why
  • Keep a list of accounts and review it regularly

Equally important is removing access when someone leaves. Dormant accounts are a known security risk, especially if they have elevated privileges.

Strong, unique passwords

Passwords are your first line of defence, and they’re often the weakest. The basics:

  • No default passwords (change them immediately)
  • No reuse across systems or services
  • Use at least 12 characters, or 8 with MFA (multi-factor authentication)

Encourage the use of passphrases (e.g., PurpleBananaEcho) instead of complex but forgettable passwords. Even better, use a password manager to generate and store strong credentials.

Enforce Multi-Factor Authentication (MFA)

If you’re relying on passwords alone, you’re exposed. MFA reduces the risk of account compromise drastically, even if a password is breached. At a minimum, turn on MFA for:

  • All admin accounts
  • Any account that can be accessed over the internet

Options include:

  • Authenticator apps (e.g., Microsoft Authenticator, Google Authenticator)
  • SMS codes (less secure, but better than nothing)
  • Push notifications or hardware tokens (e.g., YubiKeys)

Just enough, not just in time

Some systems offer a “just in time” model, where standard user accounts can temporarily elevate to admin for certain tasks. While this can sound efficient, it’s not compliant with Cyber Essentials. Why?

Because those elevated permissions are often left open too long – sometimes for days – giving attackers a wider window to exploit. Cyber Essentials requires a “just enough” model: tightly controlled admin accounts used only when needed, never for regular tasks.

Password recovery and MFA backups

Plan for when things go wrong:

  • Set up secure password recovery procedures
  • Offer backup MFA methods (e.g., backup codes, alternate devices)
  • Use lockout and throttling mechanisms to prevent brute-force attacks

This isn’t about expecting failure – it’s about preparing for reality. Even the best-trained staff can lose a device or mistype a password too many times.

Everything you need, and nothing you don’t

Good user access management is about giving people the tools they need to work – while keeping the organisation protected. It’s a balance between usability and control. When you:

  • Create separate admin accounts
  • Use strong, unique passwords
  • Enforce MFA
  • Apply the least privilege model

…you’re dramatically reducing the risk of accidental damage, data loss, or malicious compromise. These aren’t just best practices – they’re user access control best practices that protect your business at its core 👽.

To find out how I can help your organisation protect itself against a constantly evolving threat landscape, contact me via YDC, and find out whether your organisation is ready for Cyber Essentials for FREE TODAY!