The First Week Mistake Nobody Plans For

An email lands on a Tuesday morning.

It appears to come from the CEO. The name checks out. The voice sounds right. Even the signature feels convincing.

"Hey — can you help me with something quickly? I'm in back-to-back meetings. Need you to handle a vendor payment. I'll explain later."

The new hire hesitates.

They've only been at the company for four days. Everything is still unfamiliar. They don't yet know what's normal, and they definitely don't want to be the person who questions the CEO in week one.

So they step in and help.

And in that moment, the damage is already underway.

Why the first week is the highest-risk week

Every spring, businesses welcome a fresh wave of employees, many of them recent graduates and summer interns beginning their first professional roles. For the company, it is onboarding season. For attackers, it is an opening.

Keepnet Lab's 2025 New Hires Phishing Susceptibility Report found that CEO impersonation emails are 45% more likely to succeed with new hires than with experienced staff.

Cybercriminals do not usually target your most experienced people first. They focus on the employees still trying to figure things out, because the earliest days create a gap where everything feels uncertain.

A new employee may not know what a legitimate request looks like. They may not understand how the CEO normally communicates. They have not yet built the instincts or confidence that come with time, and attackers exploit that uncertainty.

But the new hire is not the real issue. The biggest risk is not the employee who is careless. It is the one who is eager to help.

If you run a business, you probably already know exactly who on your team would respond first.

The real weakness is not training. It is the setup.

Think back to that employee's first day.

The laptop was not ready. Access had not been fully provisioned. The email account was still being created. They borrowed a coworker's login to check one thing quickly. They saved a file locally because they could not reach the shared drive. They used their personal phone to look up a client number because it was faster.

None of it felt dangerous. It felt practical. It felt like doing whatever was necessary to keep moving on a hectic first day.

But during that first week, before the environment is fully in place, several risks quietly stack up. Shared credentials create accounts no one can track, files end up outside your backup systems, personal devices touch business data, and nobody explains what to do when something feels suspicious.

The same Keepnet report also found that new employees are 44% more susceptible to phishing than tenured staff. That difference is not about recklessness. It is about disorder. When onboarding is messy, security becomes optional. That is exactly the kind of environment a phishing email is built to exploit.

The attack did not create the weakness. The first day did.

What a secure first day should look like

Solving this does not require a long security lecture on day one. It requires three essentials to be ready before the new hire ever arrives.

1. Their access is planned, not patched together.

That means the laptop is ready, credentials are created, and permissions are clearly assigned. No borrowed logins, no temporary fixes, and no "we'll handle that later this week."

2. They understand what normal communication looks like in your business.

This can be a quick 10-minute conversation. Does the CEO ever email about payments? Does anyone? What should they do if something feels off? This is not a formal training session; it is basic orientation.

3. They have a safe place to ask questions.

The employee who paused before clicking that email likely would have checked with someone if they had known who to ask. Most first-week mistakes happen quietly because new hires do not want to appear unsure.

Give them a contact. Give them a process.

Most security failures do not happen because someone ignored the rules. They happen because the rules were never clear in the first place.

Maybe your onboarding is already strong. Maybe your team is small enough that first days feel more personal than procedural. But if a new hire has ever had to improvise through week one — or if you are planning to add someone this spring — it is worth addressing before that Tuesday email shows up.

Click here or give us a call at (949) 396-1100 to schedule your free 15-Minute Discovery Call.

And if you know another business owner who is about to hire, pass this along. The smartest time to secure the door is before anyone tries it.