Vendor Access Reviews: The Overlooked Security Check for Small Businesses

Most small businesses know to check employee accounts when someone leaves. Fewer check the outside vendors, software platforms, accountants, payroll providers, marketing tools, cloud services, and former contractors that may still have access months or years later.

That gap matters. Vendor access is often where business convenience quietly turns into business risk. A vendor login may touch email, billing, customer records, financial systems, backups, websites, remote support tools, or cloud storage. If nobody reviews that access, nobody really knows who can get in.

What a vendor access review is

A vendor access review is a structured check of every outside person, company, and platform that can reach your systems or data. The goal is not to make work harder. The goal is to confirm that every outside access path is still needed, properly limited, and owned by someone inside the business.

For a Southwest Virginia small business, that review may include an accounting firm with QuickBooks access, a payroll provider, a website contractor, an industry-specific software vendor, a copier company, a VoIP provider, a managed IT provider, insurance or compliance portals, and cloud services such as Microsoft 365 or Google Workspace.

Why stale vendor access is risky

Old access creates several practical problems:

• Former vendors may still have active accounts. If the relationship ended but the login did not, the business has an unnecessary exposure.
• Shared accounts hide accountability. If three vendors know the same password, it is hard to know who changed what.
• Permissions tend to grow over time. A vendor may have needed broad access during setup, but only limited access afterward.
• Outside accounts may not follow your security standards. Multi-factor authentication, password handling, and device security can vary widely.
• Incident response gets slower. During a security issue, unclear vendor access makes it harder to lock things down quickly.

None of this requires assuming bad intent. Most stale access exists because everyone was busy and the business kept moving. That is exactly why the review needs to be scheduled instead of left to memory.

What to check first

A useful first pass does not need to be complicated. Start with the systems that would hurt the most if misused or locked up:

• Email and Microsoft 365 or Google Workspace administration
• Banking, payroll, accounting, and invoicing tools
• Website hosting, domain registration, DNS, and marketing platforms
• Remote access tools, VPN accounts, and firewall/vendor support portals
• Backup systems, cloud storage, and file-sharing platforms
• Line-of-business applications that hold customer, employee, or financial records

For each outside access path, identify the vendor, the business owner, the system touched, the account used, the permission level, whether multi-factor authentication is enabled, and whether the access is still required.

What “good” looks like

A healthy vendor access process usually has a few simple rules:

• Each vendor uses a named account where the system supports it.
• Access is limited to the work the vendor actually performs.
• Administrative access is temporary or tightly controlled.
• Multi-factor authentication is required for sensitive systems.
• Someone inside the business owns approval and removal.
• Vendor access is reviewed on a schedule, not only after a problem.

This does not need to become a paperwork exercise. It does need to produce decisions: keep, reduce, change password, add MFA, convert to a named account, or remove.

How often should a small business review vendor access?

For many small businesses, quarterly is a reasonable starting point for critical systems and annually for lower-risk systems. Reviews should also happen after vendor changes, employee departures, software migrations, security incidents, ownership changes, and major process changes.

The important part is consistency. A short review done every quarter is worth more than a perfect checklist that nobody opens.

Where this fits in your larger IT process

Vendor access reviews pair well with an IT asset inventory, employee offboarding checklist, network documentation, and a regular quarterly IT risk review. Together, those controls give the business a clearer view of who has access, what they can reach, and what has to be protected first.

If your business has grown by adding software, vendors, cloud tools, and one-off contractor access over several years, this is one of the cleaner ways to reduce risk without buying another product.

TTS can help make the review practical

Tactical Technical Services helps Southwest Virginia businesses turn messy access lists into practical operating controls. We can help identify vendor access, document ownership, tighten permissions, improve MFA coverage, and build a repeatable review process that fits the way the business actually works.

If you are not sure which vendors still have access to your systems, that is the place to start. Contact TTS to schedule a practical review of your business technology access and risk.