The principle of least privilege means giving people only the access they need to perform their work. For example, an employee who handles customer orders may need sales records but has no reason to access payroll files.
Small and medium-sized businesses (SMBs) can overlook these boundaries because employees often cover several roles. Broad access seems convenient, but it increases the damage a stolen account or accidental change could cause. Applying least privilege in SMBs starts with understanding what each person needs, then removing permissions that serve no current purpose.
Find out who can access what
Before changing permissions, review your business accounts and the systems they can reach. Include outside providers and contractors, whose access may remain active long after an assignment ends.
A simple spreadsheet can help you record:
- Who owns each account
- Which applications or folders it can access
- Whether it has administrator permissions
- Why the access is still needed
Prioritize accounts that control security settings or contain sensitive information. Look for former employees’ accounts and permissions granted for completed projects. Does your SMB already have an IT company looking after your accounts? Ask them who can get into what today, and why.
Match permissions to actual responsibilities
Once you’ve mapped out access privileges, compare it with employees’ daily tasks. Ask managers what staff need to accomplish rather than copying another employee’s permissions without checking them.
You should also consider the level of access. Your front-desk staff might need to look at the client list, but that doesn’t mean they should be able to change it or wipe it out. The same goes for software: using a program every day rarely means someone needs to control how it’s set up.
Role-based access controls make this easier to manage. Instead of setting up every permission one person at a time, you pick a role like “bookkeeper” or “front desk,” and the right access comes with it. For employees with several responsibilities, combine only the permissions those duties require. Assigning an employee a broader workload doesn’t automatically justify providing them unrestricted access. Check what each application’s default roles allow before assigning them.
Separate administrator access from everyday work
Administrator accounts carry powerful permissions, such as creating users or changing security settings. Those capabilities deserve closer attention because an attacker who captures an administrator account may gain much greater control.
Use regular accounts for everyday work like email and web browsing. If someone does need admin rights, such as installing software or changing company-wide settings, give them a second login just for that, and have them log out when the job is done. That recommended approach keeps business administrator accounts secure.
Choose a limited administrator role when available; someone responsible for resetting passwords may not need authority over the entire system. And protect privileged accounts with multifactor authentication, which requires an additional form of identity verification beyond a password.
Make extra access temporary
Employees may occasionally need access to additional systems or files, such as when covering for an absent coworker or working on a temporary project. However, these permissions should only remain active for as long as they’re needed.
To manage this, establish a straightforward approval process. Employees should explain what they need access to, why they need it, and how long they’ll need it. A manager or designated administrator can then approve the request and set an expiration date. Where possible, you should configure permissions to expire automatically. Otherwise, make sure someone is responsible for removing them when the agreed period ends.
When reviewing and removing existing permissions, check with affected employees first to confirm they can still access everything they need for their daily work. If something important is removed, give them a simple way to request access again rather than resorting to sharing someone else’s login credentials.
Review access whenever responsibilities change
Even well-designed permissions become outdated. Employees moving into new roles may retain access from previous assignments. That’s called privilege creep, which is the gradual accumulation of access.
To prevent privilege creep, assign someone to check permissions on a regular schedule, such as quarterly. When a staff member changes roles, review their access immediately instead of waiting for the next scheduled check. And remove departing employees’ access promptly. Impress upon your employees the importance of keeping their access aligned with their jobs by setting that expectation into your onboarding and offboarding procedures.
When you do your review, start with your highest-risk accounts and expand it as you establish workable routines. Should you need help identifying unnecessary permissions or adjusting access without interrupting daily work, give us a call to discuss an access review.