What Is an Attack Vector? Common Cyber Threat Types and How to Prevent Them

An attack vector is the method or pathway a threat actor uses to gain unauthorized access to systems, networks, or data. Understanding which attack vectors provide a path to your devices and network helps secure your network and avoid potential cybersecurity threats.

This guide breaks down the most common cyber attack vectors, how they are exploited in real-world environments, their business impact, and practical strategies for prevention and detection at home and in enterprise IT environments.

What is an attack vector and an attack surface?

Attack vectors (also known as threat vectors or cyber attack vectors) are exploitable weaknesses in your IT infrastructure that attackers can use to gain access to your network, devices, and data.

Practically every networked device provides an attack vector of some kind that either exists as an exploitable bug or as a potential misconfiguration that can leave it vulnerable to cybersecurity attacks. Your colleagues are also a potential attack vector — a short lapse in judgment can expose sensitive information that can be exploited.

The attack surface of your systems is the sum of attack vectors for each device, so the more IT infrastructure you have, the greater your attack surface.

Common cyber attack vectors

The common types of attack vectors are deployed because they are proven to be highly effective. Proactive measures need to be taken to ensure your IT network is appropriately protected.

Malware

Malware is any software designed to harm or facilitate unauthorized access to your computer systems and network infrastructure. This includes computer worms, ransomware, macro viruses, and trojans. Notorious examples of malware include CryptoLocker (which prevents you from accessing your files until a ransom is paid), Conficker (which spread across Windows networks, infecting millions of machines) and StuxNet (which was famously used to sabotage Iran’s nuclear program).

Phishing

Phishing (and highly targeted spear phishing) uses deceptive emails and websites (and sometimes even instant messaging, SMS, and phone calls) to trick you into divulging sensitive information either about yourself or your organization. This can include passwords, bank details, and two-factor authentication codes.

Man-in-the-middle (MitM) attacks

Man-in-the-middle attacks use infected IT infrastructure (or devices that have been deliberately set up to intercept network traffic) to monitor network traffic. This allows the attacker to read sensitive information, and in some cases even interfere with the data itself (for example, to redirect online payments from their intended recipient by replacing their details).

Denial-of-service (DoS) and distributed denial-of-service (DDoS) attacks

Both types of attacks are intended to take your servers and network infrastructure offline. This may be the sole purpose of the attack (for example, to take a website offline), or it may be part of a broader attack strategy aiming to find or exploit weaknesses.

SQL injection

This type of attack targets web apps that do not implement adequate protections against end users inserting SQL code into input fields. If user input is not properly sanitized, malicious code can be inserted, which is then executed by your database system. This bypasses all of your network protections and allows database data to be read or tampered with, or for arbitrary commands to be run on your servers.

Zero-day exploits

Zero-day vulnerabilities are exploitable bugs that are unknown to the developer, meaning that no patches or mitigations are recommended for end users to protect against exploits. They are one of the most dangerous cybersecurity attack vectors, as you can’t defend against threats you don’t know about.

Insider threats

Not all cyber threats come from outside your organization, and not all of them are digital in nature. Insider threats can unintentionally (or, in the case of a disgruntled employee, maliciously) provide attackers access to your systems or improperly access or disclose sensitive information themselves. An attacker may also use social engineering or phishing to encourage employees to grant them access.

How attack vectors are exploited in real environments

Attack vectors rarely exist in isolation: modern cyberattacks typically chain multiple techniques together. For example, a phishing email may deliver malware, which then establishes persistence and enables lateral movement across the network.

Common real-world attack chains include:

• Phishing → credential theft → privileged access escalation
• Unpatched vulnerability → malware deployment → ransomware execution
• Misconfigured cloud service → data exfiltration

Understanding how attack vectors are combined helps IT teams prioritize controls like endpoint detection, network monitoring, and identity security.

Impact of attack vectors

Successful exploitation of attack vectors can have severe operational and financial consequences. Organizations may lose valuable data, affecting business continuity, or even have valuable IP stolen. If sensitive customer data (including personally identifiable information) is breached, there may also be legal consequences if best practices for protecting it were not followed.

For example, UniCredit was recently fined $3 million USD for customer data breaches and falling short of GDPR compliance. Some businesses do not survive a major cybersecurity incident: Travelex famously went into administration following a cyber attack in 2020.

How to protect attack vectors and prevent cyber threats

There are a number of IT security strategies you should implement to harden your systems and prevent attack vectors from being exploited. These include:

Using good security and cyber hygiene practices

Fostering a culture of security in your organization is paramount. Everyone should be aware of the potential for phishing emails purporting to be from legitimate senders. This requires regular training on how to spot fake emails (including phishing exercises to test that your staff is indeed remaining vigilant), as well as educating your users about their responsibility towards the data they handle, network security, and the consequences of not following established best practices.

Your users should also be aware of cyber hygiene best practices, such as not connecting to unknown WiFi networks (including public WiFi in hotels and cafes), not plugging in USB devices that they have found, and not sharing information without confirming who is requesting it and why they need it.

Use role-based access controls and two-factor authentication

Role-based access control and Two-factor authentication should be deployed to protect data access in the event login credentials are disclosed and to prevent users from accessing data they have no need to, removing potential attack vectors.

Use endpoint protection software tools and patch vulnerabilities

Anti-malware and endpoint protection software should be deployed to all devices to identify and isolate malicious code before it can do further harm. Software should be kept up-to-date so that it is fully patched against known threats. Network segmentation, firewalls, and intrusion detection/prevention systems (IDS/IPS) should also be implemented to prevent attackers from moving around your network and to help mitigate against the impacts of zero-day exploits.

Practice browser isolation and encryption

Web applications and APIs should also be secured to protect against SQL injection attacks, and sensitive data should be encrypted in transit and at rest so that if a breach does occur, it is less likely that the data can be exploited.

Conduct regular audits, vulnerability scanning, and testing

You should schedule regular security audits and assessments (including vulnerability scanning and penetration testing) to ensure that your IT security practices and tools offer sufficient protection and that your staff follows established practices.

Even the best protection strategies expose you to cybersecurity threats: it is impossible to be fully protected from threat actors that are constantly developing new attack strategies that leverage known and as-yet unknown exploits. You must have robust backup and recovery plans that keep up-to-date copies of your critical information in secure locations where they cannot be tampered with and that can be accessed for fast recovery so that your business is not wiped out by an unavoidable cybersecurity incident.

Identify your weakest entry points before attackers do. Watch What Is an Attack Vector? today.

IT teams must be able to confidently explain and justify their IT security strategies

Cyber threats are continually evolving, and new attack vectors that can be used to compromise your IT infrastructure are continually being discovered and exploited. Due to the prevalence of zero-day exploits and social engineering, even well-maintained, properly configured, and fully patched systems are vulnerable.

Remaining vigilant is the most important strategy for protecting critical IT infrastructure and data. By implementing robust remote monitoring and management software (RMM), you can maintain visibility over your cyber attack surface area, ensure that systems are patched and secured against known threats, and be informed of any suspicious behavior that may indicate an unknown threat, allowing you to take proactive measures. Want to dive deeper? Check out how RMM strengthens IT security and efficiency by exploring our RMM FAQs.