What Are The Top Cyber Threats Facing UK Businesses In 2025?

Cybersecurity has never been more important. As technology continues to evolve, so do the threats facing businesses of all sizes. In 2025, UK companies are operating in a digital environment that’s faster and more connected, but also more vulnerable, than ever before.

From ransomware to insider threats, today’s risks demand proactive strategies: it is no longer enough to rely on security patches and semi-regular system health checks. Here are the top ten cyber threats UK businesses are likely to face in 2025  —  and how you can protect your organisation from them.

Ransomware attacks are becoming smarter

Ransomware remains one of the biggest cybersecurity challenges. Attackers are now using AI to tailor their attacks, often targeting specific industries or company sizes. Once a system is infected, files are encrypted and the business is held to ransom.

Stay protected: Regularly back up critical data and store backups offsite. Implement robust endpoint protection and use email filtering to prevent malicious attachments.

Phishing scams are evolving

Phishing attacks  —  fake emails or websites that trick users into sharing passwords or financial data  —  are more convincing than ever. AI-generated messages are harder to detect, and even experienced employees can fall victim.

Stay protected: Train your team regularly on how to spot suspicious emails. Enable two-factor authentication (2FA) across all systems to reduce the risk if credentials are compromised.

Cloud misconfigurations

As more businesses move to the cloud, misconfigured servers and storage buckets are becoming prime targets. These errors can leave sensitive data publicly accessible.

Stay protected: Work with IT professionals to ensure cloud platforms like Microsoft Azure or Google Cloud are correctly set up and monitored.

Supply chain attacks

Cybercriminals are increasingly targeting software vendors and IT providers as a way to infiltrate their customers’ networks. A breach in one supplier could lead to vulnerabilities across hundreds of businesses.

Stay protected: Vet third-party vendors carefully. Ask about their security measures and look for certifications like ISO 27001 or Cyber Essentials. Regularly update and patch all software used in your business.

Insider threats

Not all threats come from the outside. Disgruntled employees, or those who are simply careless, can cause data breaches or system outages.

Stay protected: Use access control to ensure employees only see the data they need. Monitor activity across your network and conduct exit audits when staff leave the company.

Deepfake and social engineering attacks

With the rise of AI, fake video and audio messages (known as deepfakes) are becoming tools for cybercriminals. For example, a CEO’s voice might be cloned to request a money transfer.

Stay protected: Establish internal verification procedures for high-value transactions. Never act on a request based solely on voice or email  —  always double-check with another channel.

Internet of Things (IoT) vulnerabilities

Connected devices such as smart locks, printers, or HVAC systems can become weak entry points into your network if not properly secured.

Stay protected: Change default passwords, update firmware regularly, and isolate IoT devices on separate networks where possible.

Business email compromise (BEC)

This type of attack involves hackers gaining access to (or impersonating) a business email account and then sending fraudulent messages to customers, suppliers, or staff.

Stay protected: Use domain-based message authentication such as SPF, DKIM, and DMARC. Monitor outbound emails for unusual activity and educate staff on BEC tactics.

Lack of security patching

Hackers actively scan for systems running outdated software, from operating systems to apps and plugins. Even a single missed update can be exploited.

Stay protected: Keep a strict patching schedule. Use automated tools where possible, and ensure all devices are included, from servers and laptops to smartphones.

Overstretched or undertrained IT staff

With the fast pace of cyber threats, many internal IT teams are stretched thin. This can lead to overlooked vulnerabilities, slow response times, and general gaps in protection.

Stay protected: Consider partnering with a managed business IT support service who can deliver 24/7 monitoring, incident response, and ongoing strategy, giving your business the expertise it needs without the full-time costs.