How small businesses get hacked through employees

Hackers don't always need to break into your systems if they can convince someone inside your business to open the door for them.

People are naturally trusting, work under pressure, and make quick decisions throughout the day. Cybercriminals understand this and design their attacks around human behavior rather than technical weaknesses.

Key takeaways:

• Overall, 43% of UK businesses experienced a cyber security breach or attack in the 2025/2026 survey period. (UK Gov Cyber Breaches Survey).
• Phishing and spoofing were the most frequently reported internet crimes in 2024, while Business Email Compromise (BEC), which often starts with phishing, was one of the most financially damaging, according to the FBI.
• Employee mistakes are usually preventable with awareness training and simple security practices.
• Multi-factor authentication, password managers, endpoint protection, and clear security policies significantly reduce risk.

How employees accidentally put your small business at risk

Most cyberattacks don't begin with sophisticated hacking techniques or complex technical vulnerabilities, but with simple human mistakes.

1. Falling for phishing emails

An employee might receive what appears to be an invoice from a supplier, a login request, a delivery notification, or an email from the accountant asking them to review an urgent document. The message looks legitimate, creates a sense of urgency, and encourages the recipient to click them to solve a fake issue.

AI allows cybercriminals to create phishing emails faster and at a much larger scale than before. These messages often use natural language, correct grammar, and even personalized details about your business, making them much harder to spot.

Related: What to do if you clicked a phishing link in a business email

2. Reusing passwords

If an employee uses the same password across multiple work and personal accounts, a data breach on one website could give attackers access to your business accounts through a technique known as credential stuffing.

Related: How to Check If Your Business Is Affected by a Breach (And What to Do if It Is)

3. Approving fake login requests

Multi-factor authentication adds an important layer of security, but it isn't foolproof. Some attackers repeatedly send authentication requests, hoping the employee eventually taps "Approve" simply to stop the notifications. This tactic, known as MFA fatigue, has been used in several high-profile cyberattacks.

Related: What to do if your business social media account gets hacked

4. Installing unsafe software

Employees sometimes download free tools, browser extensions, AI apps, PDF converters, or file-sharing software to make their work easier.

Unfortunately, some of these downloads contain malware or request unnecessary permissions that expose business data. Even software that appears legitimate should only be installed if it's been approved by the business.

Related: How to Spot Fake Software Deals and Updates Before They Hack Your Business

5. Connecting to unsecured public Wi-Fi without a VPN

Public Wi-Fi networks in cafés, hotels, airports, or coworking spaces aren't always secure, making it easier for attackers to intercept internet traffic or create fake hotspots that look legitimate.

Using a trusted VPN helps protect sensitive business information when working outside the office.

Related: What to do if you lose a business laptop or phone while traveling

6. Oversharing on social media

A LinkedIn post mentioning new software, an Instagram photo of a workstation, or a social media update about an upcoming conference can all provide useful information that attackers use to make phishing emails more believable.

The more they know about your business, the easier it becomes to impersonate someone you trust.

Related: How to check if your business is being impersonated

7. Sending sensitive information to the wrong person

Not every data breach involves a hacker. Sometimes, it's simply a matter of sending sensitive information to the wrong person. A customer list is emailed to the wrong recipient, payroll information is shared because of an autocomplete mistake, or an invoice containing confidential details ends up with another client. These errors can still lead to data breaches, financial losses, and compliance issues.

Related: CEO Scams: How to Identify, Avoid, and Protect Your Business

8. Using personal devices for work

Many small businesses allow employees to check work emails or access company files from their own phones, tablets, or laptops. If those devices aren't updated, protected with strong passwords, or secured with endpoint protection, they can become another way for attackers to access your business.

Clear bring-your-own-device (BYOD) policies and basic security requirements can significantly reduce this risk.

Related: No IT Department? How Small Teams Can Safely Manage Bring Your Own Device (BYOD)

9. Falling for AI-powered scams

 Employees may receive phishing emails written by AI, answer phone calls using deepfake voices that sound like a manager or colleague, or even interview fake job applicants using AI-generated identities.  As AI tools become more accessible, teaching employees how to recognize these newer threats is becoming just as important as protecting them from traditional phishing emails.

Related: How Hackers Use AI to Target Small Businesses.

While these attacks are common, they're also largely preventable. The right combination of security tools, employee awareness, and clear workplace policies can stop many attacks before they succeed.

Common employee cybersecurity mistakes and how to prevent them

How to reduce employee cybersecurity risks

Instead of asking, "Who made the mistake?", it's often more useful to ask, "What security measures could have prevented it?"

Here are a few practical steps:

• Train employees to recognize phishing emails, fake websites, and common scams.
• Enable multi-factor authentication on all business accounts.
• Encourage employees to use a password manager and unique passwords.
• Install modern endpoint protection on all business devices.
• Keep software and operating systems updated automatically.
• Limit access to sensitive information so employees only have access to what they need.
• Encourage employees to report suspicious emails or mistakes immediately, without worrying about getting into trouble.

Your employees can be your strongest security layer

Cybercriminals target employees because they're often the easiest way into a business. But with the right support, your team can also become one of your best defenses.

Regular cybersecurity awareness, clear security policies, and modern protection tools can significantly reduce your risk. Solutions like Bitdefender Ultimate Small Business Security for businesses with 3 to 25 employees help protect against phishing, scams, ransomware, malware, and other common cyber threats, helping prevent a single employee mistake from becoming a costly cyberattack.

Try Bitdefender Ultimate Small Business Security free for 30 days.

FAQs

How do hackers target employees?

Hackers commonly use phishing emails, fake login pages, social engineering, stolen passwords, malicious downloads, and phone scams to trick employees into giving them access to business systems.

What is the biggest cybersecurity risk for employees?

Phishing remains one of the biggest risks because it can lead to stolen passwords, malware infections, ransomware, and business email compromise.

Can one employee cause a data breach?

Yes. A single compromised account or accidental mistake can allow attackers to access sensitive company data, customer information, or internal systems.

How often should employees receive cybersecurity training?

Security awareness should be ongoing, with short training sessions and phishing simulations throughout the year rather than a single annual course.

What should an employee do after clicking a suspicious link?

They should disconnect from the internet if appropriate, report the incident immediately, avoid entering any credentials, and change affected passwords if requested by the IT team or security provider.

Can employees accidentally install malware?

Yes. Employees can accidentally install malware by downloading fake software, opening malicious email attachments, installing unsafe browser extensions, or running infected files disguised as legitimate documents.