How Cyber Attacks Actually Happen: A Look at the Most Common Attack Paths

A legitimate-looking email arrives in the company inbox. Someone clicks. Within minutes, attackers are inside your systems.

According to the Department for Science, Innovation and Technology’s 2025/2026 Cyber Security Breaches Survey, 43% of UK businesses experienced a cyber security breach or attack in the past 12 months. That’s roughly 612,000 companies across the country, including hundreds across Birmingham and the wider West Midlands. These attacks follow documented patterns – common cyber security threats that become obvious once you know the attack vectors to look for.

Attack Path #1: Emails That Look Real

Phishing is the most prevalent attack vector identified by UK businesses, experienced by 38% of all businesses and named as the most disruptive type of breach in 69% of cases. The pattern is consistent: most successful attacks start with an email.

A message lands in someone’s inbox. It appears to come from a trusted supplier, HMRC, or the company’s own IT department. The sender address looks correct at a glance. The branding matches. There’s an urgent tone, demanding payment for an unpaid invoice, alerting a suspended account, or a security update required immediately.

The employee clicks the link. They download the attachment, or they enter their login details on what turns out to be a fake website. Within minutes, attackers have credentials that open access to your systems or malware running on your network.

What makes this particularly effective is volume. Attackers only need one employee to fall for it. NCSC data shows phishing campaigns can involve thousands of attempts. Even organisations with security awareness training see these emails slip through human judgement when people are busy, distracted, or simply trusting.

The 2025/2026 DSIT survey found that only 30% of UK businesses conducted a cyber risk assessment. Without knowing which staff handle sensitive data or have access to critical systems, companies can’t calculate their actual exposure when someone clicks.

Attack Path #2: Password Weaknesses

The ICO reports that up to 65% of people reuse the same password across multiple accounts. When one service experiences a data breach, those credentials appear on the dark web. Attackers then test them systematically across other platforms, which is a technique called credential stuffing.

In 2019, NCSC analysed breached password databases and found “123456” appeared in over 23 million accounts. The rest of the top five – “123456789”, “qwerty”, “password” and “1111111” – showed the same pattern: short, predictable and the first guesses any attacker tries. NCSC’s current guidance is to use three random words instead.

Brute force attacks work by systematically testing every possible password combination until finding the right one. Computing power has made this faster than ever. An eight-character password using only lowercase letters can be cracked in hours. Add length and complexity – uppercase, numbers, symbols – and that timeline extends to years. The difference between “password” and “T7x!WindowHorseJelly9” is the difference between hours and decades.

Multi-factor authentication blocks over 99.9% of account compromise attacks, according to Microsoft research. Yet adoption remains patchy, particularly among small and medium businesses where implementation feels like a technical project rather than standard practice.

Attack Path #3: The Software Nobody Updated

When Microsoft, Adobe, or any software vendor releases a security update, they’re fixing a known vulnerability. That vulnerability is now public knowledge. Security researchers found it, reported it, and the vendor patched it. The announcement also tells attackers exactly what to look for in systems that haven’t updated yet.

Attackers use automated tools to scan thousands of IP addresses, looking for specific software versions with known weaknesses. When they find one, the exploitation process is often standardised and sometimes even automated.

Legacy systems create particular problems. Older Windows versions, unsupported software, or custom-built applications that haven’t been maintained for years all accumulate vulnerabilities that will never receive official patches. Businesses running these face a choice between expensive upgrades and accepting expanding risks.

The 2025/2026 DSIT survey found that breach costs sit at zero for most businesses but can climb significantly for those that are seriously affected, with the top 5% of medium and large businesses facing costs of £10,000 or more per incident. For context, that’s often well in excess of the cost of maintaining regular updates and patches through proper IT support.

Attack Path #4: Insider Weaknesses and Misconfigurations

Insider threats split into two categories. There are malicious insiders, which are employees or contractors deliberately stealing data or sabotaging systems. These are rare.

More common are unintentional insider risks, which consist of misconfigured cloud storage buckets, databases with default credentials still in place, file shares with permissions set too broadly, or USB drives left in bags or cars. These tend to be gaps in process and training.

The shift to remote and hybrid working expanded this attack surface significantly. Home networks, personal devices, public Wi-Fi, shared workspaces all add complexity to securing access. The 2025/2026 DSIT survey found that adoption of remote-access controls like VPNs remains low – only 36% of businesses use one for staff connecting remotely.

Misconfigurations often go undetected until someone finds them. It could be an internal audit, a penetration test, or an attacker running automated scans. The latter tends to discover them faster.

What Happens After the Breach?

Once attackers are inside your systems, several paths open up.

Ransomware among UK businesses dropped from 3% in 2024/2025 to 1% in 2025/2026, but the typical attack still encrypts files and demands payment for the decryption key. Recovery times vary – 92% of businesses were back to normal within 24 hours, but that still left thousands dealing with extended disruption.

Data theft operates more quietly. Stolen customer records, financial information, or intellectual property are either sold or held for extortion. Some businesses only discover the theft when customers report unusual activity or when regulatory bodies notify them of leaked data appearing online.

The reputational damage can outlast the technical recovery. DSIT data shows businesses reporting reputational harm rose from 1% in 2024/2025 to 3% in 2025/2026.

How Layered Security Interrupts Attack Paths

Email filtering blocks phishing attempts before they reach inboxes. When combined with employee training that teaches people to question unexpected requests, the success rate drops significantly.

Strong password policies and multi-factor authentication remove the easy wins from brute force attacks. Regular security patches close the vulnerabilities that automated scans are looking for.

Business continuity planning means knowing what to do when, not if, an incident occurs. Backups are stored offline and tested regularly. Incident response plans that get followed. Clear escalation procedures that work at 3am on a Sunday, not just during office hours.

These controls interrupt specific, documented attack paths that work on businesses across Birmingham and the West Midlands every week.

MT Services works with companies across the region to build defences that match actual threats. From email security to IT support and security awareness training, the focus is on blocking the paths that real attackers use in real breaches.

The statistics make clear that cyber attacks are extremely common. They follow patterns, but they’re preventable when those patterns are understood. Book a consultation with MT Services to build a cyber security strategy that addresses these specific attack vectors.