5 Cybersecurity Mistakes Small Business Owners Make—and How to Avoid Them.

Dr. Justin K Joshuva — Mon, 14 Sep 2026 00:00:00 +0000

Running a small business means balancing customers, employees, invoices, and countless daily decisions. Cybersecurity can easily become something you plan to handle “when things slow down.”

But everyday habits—how you sign in, approve payments, and save files—can leave your business exposed.

You do not need to solve everything at once. Start by addressing these five common mistakes.

1. Reusing the Same Password

Using one password for your email, accounting software, and online store may feel convenient. The problem is that a breach at one service can put your other accounts at risk. Criminals can try stolen usernames and passwords on additional websites.

A slightly modified password is not a reliable solution either. Changing “Business2026!” to “Business2027!” creates a predictable pattern.

What to do instead: Use a unique, long password for every account. A password manager can generate and store passwords so you do not have to memorize them all. Protect the password manager itself with a strong master password and multifactor authentication.

Start today: Replace any reused password on your business email account. Email often controls password resets for your other services.

2. Skipping Multifactor Authentication

A password alone provides only one barrier between an attacker and your account. If it is stolen through a scam or exposed in a breach, someone else may be able to sign in.

Multifactor authentication, or MFA, adds another verification step. Depending on the service, this might involve an authenticator app or a security key.

What to do instead: Enable MFA on your email, financial services, cloud storage, and administrator accounts. When available, choose phishing-resistant options such as security keys or appropriately configured passkeys. Store recovery codes somewhere secure.

Never approve a sign-in request you did not initiate.

Start today: Open your email account’s security settings and check whether MFA is enabled.

3. Trusting Urgent Payment Requests

An email arrives from someone who appears to be your supplier: “Our bank details have changed. Please send today’s payment to this account.”

The message looks professional. It may even appear in a familiar conversation. That does not prove the request is legitimate—an account could have been compromised.

What to do instead: Verify new payment instructions through a separate, trusted channel. Call the supplier using a number already in your records, rather than a number supplied in the suspicious message.

Establish a clear rule: changes to bank details require independent verification. For larger payments, consider requiring a second person’s approval.

Start today: Tell everyone who handles payments that urgency never removes the need to verify.

4. Delaying Software Updates

It is tempting to dismiss an update notification when you are busy. However, updates often fix security weaknesses as well as improve features.

Leaving software outdated can leave known weaknesses available for attackers to exploit.

What to do instead: Enable automatic updates where practical. Schedule updates that require downtime, and remember devices beyond your main computer: phones, routers, and other connected equipment also need attention.

If a product no longer receives security updates, plan to replace it or move to supported software.

Start today: Check your operating system and web browser for pending updates.

5. Keeping Backups Without Testing Them

Having files in cloud storage does not automatically mean you have a recovery plan. Synchronization can copy unwanted changes or deletions, and a backup accessible through a compromised account may also be vulnerable.

A backup is useful only if you can restore the information you need.

What to do instead: Keep separate backups of essential business data. Include an offline copy or a backup protected against alteration, and secure backup access separately where possible.

Test recovery periodically. Restore a sample file to a separate location, open it, and confirm that it contains the expected information. Also consider how you would recover your business applications—not just individual documents.

Start today: Choose one important file and verify that you can recover it from a backup.

Make One Improvement Today

Choose one action from this article and complete it before the day ends. Then assign someone responsibility for the next step.

Consistent habits can reduce avoidable risks and make recovery easier when something goes wrong. The goal is steady progress supported by clear procedures your team can follow.

For more practical guidance, explore my book, Outsmart the Cybercriminals: The Small Business Owner’s Practical Guide to Preventing Scams, Ransomware, and AI-Powered Fraud… Without an IT Department.

Buy on Amazon

Subscribe to my newsletter for practical cybersecurity tips and updates on my writing.

]]>

Dr. Justin K Joshuva | Updates

5 Cybersecurity Mistakes Small Business Owners Make—and How to Avoid Them.