It lands in the inbox on a Tuesday morning.
It appears to come from the CEO. The name is right. The writing sounds right. Even the signature feels authentic.
"Hey — can you help me with something quickly? I'm stuck in back-to-back meetings. I need you to process a vendor payment. I'll explain later."
The new hire hesitates.
They've only been there four days. They're still learning the workflow, still trying to understand what normal looks like, and the last thing they want to do in their first week is challenge a request from the CEO.
So they step in and do it.
And in that moment, the breach begins.
Why week one is the most exposed window
Each spring, organizations welcome a fresh group of employees, including recent graduates and summer interns entering the workforce for the first time. For leadership, that means onboarding. For threat actors, it means opportunity.
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 don't usually target your most experienced employees. They focus on the people still getting oriented because the earliest days create a gap where nothing is familiar and confidence hasn't fully formed.
A new employee doesn't yet know what a routine request should look like. They don't know how the CEO typically communicates. They haven't built the instincts that come with time, and attackers exploit that uncertainty.
But the real issue isn't the new employee. The biggest risk isn't someone being reckless. It's someone trying hard to be helpful.
If you lead a team, you probably already know which person would reply first.
The weakness usually isn't training. It's the process.
Think about that employee's first day.
The laptop wasn't ready. Access was incomplete. The email account was still being provisioned. They used a coworker's login to check something urgent. They saved a document locally because the shared drive wasn't available. They grabbed a client number from their personal phone because it was quicker.
None of it seemed dangerous. It just felt practical, like getting through a messy first day as efficiently as possible.
Yet in that first week, while everyone is trying to keep things moving, small risks start to stack up. Shared credentials create untracked access, files fall outside backup coverage, personal devices touch company data, and no one clarifies what to do when something doesn't seem right.
The same Keepnet report also shows that new employees are 44% more likely to fall for phishing than tenured staff. That difference isn't about carelessness. It's about disorder. When onboarding is disorganized, security gets pushed aside. That's exactly the environment a phishing email is designed for.
The attacker didn't create the weakness. Day one did.
What a safer first day should include
Closing this gap doesn't require a long-winded security lecture on day one. It starts with making sure three essentials are ready before the new hire arrives.
1. Their access is set up, not cobbled together.
The laptop should be ready, credentials should be created, and permissions should be clearly assigned. No borrowed logins, no temporary shortcuts, and no "we'll handle that later this week."
2. They understand what a normal request looks like in your company.
This can be a short, 10-minute conversation. Does the CEO ever email staff about payments? If so, how? What should they do if something seems suspicious? This isn't formal training — it's practical orientation.
3. They know where to go when something feels off.
The employee who paused before opening that email might have asked for help if they had a safe place to ask. Most first-week mistakes happen quietly because new hires don't want to appear inexperienced.
Give them a person. Give them a clear path.
Most security incidents don't happen because someone ignores policy. They happen because they haven't learned it yet.
Maybe your onboarding is already strong. Maybe your team is small enough that the first day feels more personal than procedural. But if a new hire has ever had to improvise through week one — or if you're planning to bring someone on this spring — it's worth tightening the process before that Tuesday email shows up.
Click here or give us a call at 1-310-798-0405 to schedule your free 15-Minute Discovery Call.
And if you know another business owner who's hiring soon, pass this along. The smartest move is sealing the gap before anyone has a chance to walk through it.
