The message lands in the inbox on a Tuesday morning.
It appears to come from the CEO. The name is right, the wording sounds authentic, and even the signature seems familiar.
"Hey — can you help me with something quickly? I'm stuck in back-to-back meetings. I need you to take care of a vendor payment. I'll fill you in later."
The new hire hesitates.
They've only been at the company for four days. They're still learning the workflow. They don't yet know what a legitimate request looks like, and they definitely don't want to be the person who challenges the CEO during their first week.
So they comply.
And just like that, the organization is exposed.
Why week one is the highest-risk window
Each spring, employers welcome a fresh wave of recent graduates and summer interns into their first professional roles. For businesses, it's onboarding season. For attackers, it's prime hunting season.
Keepnet Lab's 2025 New Hires Phishing Susceptibility Report found that CEO impersonation emails are 45% more likely to work on new hires than on experienced employees.
Cybercriminals don't target your most established staff first. They focus on the people still finding their footing, because the opening days of employment are full of uncertainty.
A new employee doesn't yet know what a routine request sounds like. They don't know how leadership typically communicates. They haven't built the instincts or confidence that come with time, and attackers count on that gap.
But the issue isn't the employee. The biggest risk isn't someone who doesn't care. It's someone who is trying too hard to be helpful.
If you lead a team, you probably already know exactly who would answer that email first.
The problem isn't only training. It's the process.
Think about a new hire's first day.
The laptop wasn't fully ready. Access was incomplete. The email account was still being created. They used someone else's login for a quick check. They saved a file to the desktop because the shared drive wasn't available. They pulled up a client number on their personal phone because it was faster.
None of that seemed dangerous. It felt efficient. It felt like doing whatever was necessary to keep moving on a hectic first day.
But during that first week, while the environment is still coming together, small risks stack up. Shared credentials create untracked access, files move outside backup coverage, personal devices touch company data, and no one explains what to do when something seems suspicious.
The same Keepnet report found that new employees are 44% more vulnerable to phishing than tenured staff. That gap isn't driven by negligence. It's driven by disorder. When onboarding is messy, security becomes an afterthought. That's exactly the kind of environment a phishing email is designed to exploit.
The attack didn't create the weakness. The first day did.
What a secure first day should include
Closing this gap doesn't require a lengthy security lecture on day one. It requires three essentials to be in place before the new hire arrives.
1. Their access is ready, not improvised.
That means the laptop is prepared, credentials are set up, and permissions are clearly defined. No borrowed logins, no temporary fixes, and no "we'll handle it later this week."
2. They understand what normal communication looks like in your company.
This can be a quick 10-minute conversation. Does the CEO ever email about payments? Does anyone? What should they do if a message feels unusual? This isn't formal training; it's simple, practical orientation.
3. They have a safe place to ask questions.
The employee who paused before clicking that email probably would have checked with someone if they knew who to ask. Many first-week mistakes happen quietly because new hires don't want to seem inexperienced.
Give them a person. Give them a path.
Most security failures don't happen because someone ignores the rules. They happen because no one taught the rules yet.
Maybe your onboarding process is already strong. Maybe your team is small enough that the first few days feel personal instead of procedural. But if you've ever had a new hire make it up as they go through week one — or if you're planning to hire this spring — it's worth talking now, before that Tuesday email shows up.
Click here or give us a call at (858) 538-4729 to schedule your free Consultation.
And if you know another business owner who's preparing to hire, send this their way. The best time to lock the door is before anyone tries the handle.
