Say the words “insider threat” and most people picture the same scene: a disgruntled employee, storming out the door with a USB drive full of stolen files. It makes for a dramatic headline. It’s also not the version most businesses actually deal with.
September is National Insider Threat Awareness Month, and it’s a good moment to talk about what insider risk actually looks like for a small or mid-sized business — because the real version is a lot less cinematic, and a lot more common, than most people assume.
What Insider Risk Actually Looks Like
Malicious insiders exist, but they’re the exception. Far more often, insider risk comes from ordinary gaps that build up over time and nobody happens to be watching:
An employee reuses the same password across work and personal accounts. A former employee’s login credentials are never formally deactivated after they leave. A vendor or contractor is granted broad system access for a single project and keeps that access long after the project ends. None of these require bad intent. They just require nobody owning the ongoing job of reviewing who has access to what.
Why This Gets Overlooked
Access tends to get granted reactively — someone starts a new job, a vendor needs to integrate with a system, a contractor needs temporary access for a project. Very few businesses have an equally reliable process for removing that access once it’s no longer needed. Over time, the gap between “who currently has access” and “who should currently have access” quietly widens, and most businesses only discover how wide it’s gotten after something goes wrong.
A Simple Starting Point
You don’t need an elaborate audit to start closing this gap. Three questions are usually enough to reveal where the biggest risks are hiding:
Could you list everyone with access to your core systems right now, without checking anything? Does anyone who has left the company still have working credentials? Do any vendors or contractors have more access than their current role actually requires?
If any of those questions gave you pause, that’s normal — and it’s also exactly the kind of gap worth closing before it becomes a bigger problem. Vendor access in particular deserves its own look; if outside partners are part of your risk picture, our guide to third-party risk management covers that in more depth.
Making Access Review an Ongoing Habit
The businesses that handle this well don’t treat access review as a one-time cleanup project. They build it into a regular cadence — someone is responsible for periodically checking who has access to what, removing what’s no longer needed, and making sure new access requests go through an actual process rather than an ad hoc favor.
That’s a natural fit for a vCISO, whose role includes exactly this kind of ongoing oversight — the ownership piece that’s usually missing when insider risk quietly builds up in the first place.
Frequently Asked Questions
What is an insider threat?
An insider threat is any security risk that originates from someone with legitimate access to an organization’s systems — an employee, former employee, contractor, or vendor. It can be malicious, but far more often it’s accidental or the result of access that was never properly removed.
Why is National Insider Threat Awareness Month observed in September?
It’s an annual observance intended to raise awareness of insider risk and encourage organizations to review their access controls and security practices.
How do I know if my business has an insider threat problem?
A useful starting point is asking whether you can confidently list everyone with system access right now, whether former employees still have working credentials, and whether vendors have more access than they need. Uncertainty on any of those points is a sign it’s worth a closer look.
What’s the difference between an insider threat and third-party risk?
Insider threat typically refers to risk from anyone with legitimate internal access, including employees and contractors. Third-party risk specifically covers the risk introduced by outside vendors and partners. The two overlap significantly, since vendor access is one of the most common sources of insider risk.