In today’s digital world, cyber attacks aren’t just a risk for large corporations—they’re a growing threat to small and medium-sized UK businesses, too. In fact, according to the UK Government’s Cyber Security Breaches Survey, nearly one in three UK businesses reported a cyber attack or breach in the past 12 months.

The good news? Most attacks exploit common vulnerabilities—and with the right awareness and safeguards, they’re preventable.

Here are five of the most common cyber attack methods used against businesses and how you can protect your organisation against them.

1. Phishing Emails

The attack:
Phishing is the most widespread form of cyber attack. It typically involves fake emails that look legitimate—often appearing to come from banks, suppliers, or even colleagues. These emails aim to trick users into clicking malicious links or handing over sensitive information like login credentials or payment details.

How to protect against it:
Start by training your staff to spot the signs of phishing—such as poor grammar, suspicious links, or unexpected attachments. Implement email filtering to reduce spam and malicious messages. Use multi-factor authentication (MFA) so even if login details are stolen, attackers can’t access your systems. Cyber Essentials includes phishing protection as a key requirement.

2. Ransomware Attacks

The attack:
Ransomware encrypts your files and systems, locking you out until a ransom is paid (often in cryptocurrency). It typically spreads through email attachments or vulnerable remote access systems. Once inside, it can bring your business to a halt.

How to protect against it:
Back up your data regularly and store it securely, ideally off-site or in the cloud. Keep your operating systems and software fully updated to patch known vulnerabilities. Install reputable anti-malware tools, and limit access to sensitive areas of your network. Staff should never open unexpected attachments—even from known contacts.

3. Weak Passwords and Poor Access Control

The attack:
Cybercriminals often gain access simply because businesses use weak or reused passwords—or fail to deactivate old user accounts. With tools like credential-stuffing bots, attackers can try thousands of password combinations quickly.

How to protect against it:
Enforce strong password policies and encourage the use of password managers. Ensure all staff accounts are protected by MFA. Regularly audit your user accounts and disable access for former employees or unused accounts. Cyber Essentials includes access control as one of its five core pillars.

4. Unpatched Software and Systems

The attack:
Cyber attackers actively look for systems that are running outdated software with known vulnerabilities. If your business hasn’t applied security updates, you could be leaving the door wide open to exploitation.

How to protect against it:
Enable automatic updates wherever possible. Assign someone within your business (or an IT support provider) to manage patching for all systems, apps, and devices—including staff laptops and mobile phones. Applying patches promptly is one of the simplest and most effective ways to reduce risk.

5. Insecure Remote Access and Devices

The attack:
With hybrid and remote working now standard, attackers often target remote access systems like VPNs, remote desktops, or cloud platforms. Poorly secured connections or unprotected devices are common entry points.

How to protect against it:
Use encrypted VPNs, enable MFA on all remote services, and ensure all devices connecting to your network—whether company-owned or BYOD—are protected with up-to-date antivirus and encryption. Establish clear remote work policies to maintain control over who accesses your business systems and how.

Final Thoughts: Prevention Starts with the Basics

Many attacks aren’t particularly sophisticated—they rely on human error, outdated software, or overlooked settings. By implementing foundational protections like those in the Cyber Essentials scheme, businesses can defend themselves against the vast majority of common cyber threats.

Cybersecurity doesn’t need to be complicated or expensive—but it does need to be proactive. A few smart choices now can prevent major disruption, reputational damage, and financial loss later.