Types of Cyber Threats and Attack Vectors

A cyber threat is any potential cause of harm to an information asset. An attack vector is the specific pathway or method an attacker uses to gain unauthorised access to a system or data. Understanding the difference between these two concepts matters: threats describe what could happen; attack vectors describe how it happens. Both are essential for thinking clearly about risk.

The Verizon Data Breach Investigations Report 2025 analysed more than 22,000 incidents and 12,195 confirmed breaches, the largest dataset in the report’s eighteen-year history. Its findings give us a statistically grounded picture of the current threat landscape that is directly relevant to managers in every sector and country.

The Current Threat Landscape: What the Data Tells Us

Three themes dominate the 2025 data. First, the human element continues to be the primary driver of breaches: 60% of all breaches involved a human element, whether through social engineering, credential misuse or error. Second, credential abuse remains the most common initial access vector, used in 22% of all breaches, with stolen credentials present in 88% of basic web application attacks. Third, third-party involvement in breaches doubled year on year, rising from 15% to 30% of all breaches, reflecting the growing risk associated with supply chain relationships and partner ecosystems.

These findings are not abstract statistics. They describe the most likely ways that an organisation similar to yours will experience a security incident. They are also, crucially, findings that point to management and behavioural responses as much as technical ones. The human element, credential security and third-party risk are all areas where managers exercise significant direct influence.

The Major Threat Categories

• Phishing and Social Engineering

Phishing is the practice of sending deceptive communications, typically emails but increasingly text messages, voice calls and even deepfake video, designed to trick individuals into revealing credentials, clicking malicious links, downloading malware or authorising fraudulent transactions. Social engineering is the broader category: the use of psychological manipulation to exploit human trust rather than technical vulnerabilities.

The European Union Agency for Cybersecurity (ENISA) reports phishing as the most common intrusion vector, accounting for approximately 60% of initial access attempts. In 2025, AI-enhanced phishing attacks have become significantly more sophisticated. Generative AI enables attackers to produce highly convincing, personalised messages in multiple languages that are increasingly difficult to distinguish from legitimate communications. Spear phishing, which targets specific named individuals rather than sending bulk emails, has become particularly effective against managers and senior leaders who are high-value targets.

Business Email Compromise (BEC) is a specific and extremely costly form of social engineering in which attackers impersonate a senior executive, a trusted supplier or a financial institution to trick an employee into making an unauthorised payment or transferring data. In 2024, according to the FBI, more than $6.3 billion was transferred as part of BEC scams globally. The median amount extracted per incident continues to rise.

• Ransomware

Ransomware is malicious software that encrypts an organisation’s data or locks it out of its systems, then demands a payment, typically in cryptocurrency, in exchange for the decryption key. The Verizon 2025 DBIR found ransomware was present in 44% of all breaches, a 37% increase from the previous year. For small and medium-sized businesses specifically, ransomware was present in 88% of breaches, reflecting the disproportionate impact on organisations with less mature security capabilities. Modern ransomware attacks frequently involve double extortion: attackers exfiltrate sensitive data before encrypting it, then threaten to publish the stolen data publicly if the ransom is not paid. This means that even organisations with good backup and recovery capabilities cannot simply restore their systems and ignore the demand; the reputational and regulatory consequences of having sensitive data published may be severe regardless of whether operations can be restored.

Even organisations that refuse to pay a ransom, which is the recommended approach, face average recovery costs of $5.08 million due to operational downtime, system restoration, legal costs and regulatory scrutiny.

• Vulnerability Exploitation

Vulnerability exploitation refers to attacks that target known weaknesses in software, hardware or configuration settings. The Verizon 2025 DBIR found a 34% increase in this attack vector compared to the previous year, with a particular focus on perimeter devices such as firewalls, VPN gateways and network access control solutions. Research from Arctic Wolf found that in 76% cent of intrusion cases examined, attackers exploited one or more of ten specific vulnerabilities, all of which were previously known and had patches available at the time of exploitation.

This is one of the most important findings in current cyber security research: the majority of successful vulnerability exploits target weaknesses that organisations already know about and could have addressed through timely patching. The barrier to many breaches is not technical sophistication but organisational discipline, which is directly within a manager’s sphere of influence.

• Insider Threats

Insider threats are security risks that originate from within an organisation, whether through deliberate malicious action by a current or former employee, or through accidental disclosure, error or negligence. The 2025 DBIR found notable regional variation in insider threat patterns: in EMEA, nearly 29% of breaches originated from within the organisation, a significantly higher proportion than in APAC (1%) and North America (5%).

Insider threats are particularly difficult to detect and manage because they involve individuals who already have legitimate access to systems and data. Deliberate insider threats may involve data theft, sabotage or fraud. Accidental insider threats, which are far more common, include sending emails to the wrong recipients, misconfiguring systems, accidentally deleting data or falling victim to phishing attacks. Both categories are significantly influenced by the culture and processes a manager creates within their team.

• Supply Chain and Third-Party Attacks

The doubling of third-party involvement in breaches documented by the Verizon 2025 DBIR reflects a strategic shift by attackers: rather than attacking well-defended organisations directly, they increasingly compromise less well-protected suppliers, partners or software vendors to gain a pathway into their targets. This was the approach used in several of the most significant breaches of recent years.

For managers, third-party risk is not a theoretical concern. Every supplier that has access to your systems or data, every software product your team uses, and every cloud service your organisation relies on represents a potential entry point if that third party’s security is inadequate. Managing this risk requires understanding your supply chain, asking the right questions of suppliers about their security practices, and ensuring that contractual and governance arrangements provide appropriate accountability.

• Emerging Threats: AI-Enabled Attacks

The integration of artificial intelligence into attack toolkits is one of the most significant developments in the current threat landscape. Generative AI is being used to create more convincing phishing emails, to generate deepfake audio and video for social engineering attacks, and to accelerate the development of malware. In 2025, a surge in AI-enhanced attacks specifically targeting organisations via deepfake impersonation of executives has been documented globally. At the same time, 72% of employees accessing generative AI tools through personal rather than corporate accounts create a significant data leakage risk, as sensitive organisational information may be processed by external AI platforms outside any security or governance controls.