10 Common Cyber Attack Vectors and How to Avoid Them

Cybercriminals never stop evolving their tactics. A decade ago, malware sites posed the biggest threat to most organizations. Today, sophisticated ransomware attacks target enterprises daily, and threat actors have developed increasingly creative attack methods to breach corporate defenses.

In this evolving threat landscape, understanding the most common cyber attack vectors provides your security teams with the knowledge they need to protect sensitive information and reduce cyber risk across your organization. 

What is an attack vector?

An attack vector is the method a threat actor uses to gain access to your systems, networks, or data. Think of it as an entry point that cybercriminals exploit to deliver malicious code, steal data, or disrupt operations. Every cyber attack begins with a threat actor identifying and exploiting one of these pathways.

Common attack vectors include phishing emails, compromised credentials, unpatched software vulnerabilities, and misconfigured cloud services. Cyber attack vectors include both technical exploits and social engineering tactics that manipulate human behavior. 

These vectors used by threat actors represent potential weaknesses in your security posture that require continuous monitoring and proactive defense.

Understanding your organization’s attack surface is the first step toward building effective defenses. Your attack surface encompasses every point where an attacker could potentially gain unauthorized access to your environment.

Phishing remains the top threat

Phishing is a social engineering attack, which means that a bad actor is playing on your sympathies or trying to convince you that they’re someone else in order to obtain sensitive information like your personally identifiable information (PII), financial data, or credentials. This type of attack remains one of the most effective ways for criminals to breach organizations.

If you’ve ever been emailed by a prince in Nigeria who needs to get rid of some money, you’ve experienced a phishing attack. However, attacks that target businesses are much more sophisticated and less easy to spot. Some campaigns target individuals using publicly available information, such as details posted on social media, and appear legitimate. An attacker may pose as a vendor, executive, or service provider to manipulate victims into taking harmful actions.

Strong email security practices can significantly reduce phishing risk. 

Train your staff to recognize warning signs, such as urgent requests for information, unfamiliar sender addresses, and links that don’t match their displayed text. Encourage employees to verify suspicious requests through a separate communication channel before responding to them. Ongoing security awareness training helps employees recognize and report these threats before they cause damage.

Malware delivers malicious code

Malware is any malicious software intentionally designed to harm your devices, network, or system. Malware comes in several forms, from traditional computer viruses and self-replicating worms to the ransomware variants we’ll cover next. 

Common types of malware include trojans, spyware, adware, and rootkits, each designed to exploit vulnerabilities in different ways. Threat actors often deliver malware to a computer or network through phishing emails that are clicked, although users may also download it from malicious websites by mistake.

You can reduce malware risk by monitoring user traffic online, watching for anomalies in user email behavior, and deploying antivirus solutions across your endpoints. These security measures help your security teams catch threats before they can execute and spread.

Ransomware attacks encrypt your data

Ransomware is a type of malware responsible for some of the most significant data breaches in recent history. It is a type of attack that locks users out of their systems and data by using strong encryption. To obtain the decryption key, victims must pay a ransom. If they refuse, threat actors threaten consequences ranging from posting proprietary information publicly to permanently destroying the data.

That doesn’t mean criminals always keep their word when the ransom is paid. They are criminals after all. Protect your organization by training employees not to click suspicious links, scanning emails for malware, and maintaining backups of all data stored separately from your main network. If ransomware strikes but you have your systems backed up, you’ll be able to keep doing business despite the attack.

Denial of service (DoS) attacks disrupt operations

First, the bad news. A DoS attack remains one of the most common attack vectors. Distributed Denial of Service or DDoS attacks, also continue to rise year over year. Now the good news. These attacks are relatively straightforward to prevent with the right defenses in place.

DDoS attacks are designed to disrupt your operations by overwhelming systems with traffic. They bombard your servers with requests until legitimate users can no longer access your services. This active attack type can cripple business operations for hours or even days if defenses aren’t properly configured. Your security teams should monitor network traffic patterns and implement filtering to identify and block malicious requests before they impact operations.

Compromised credentials and brute force attacks

We’ve all heard horror stories about users with ‘1234’ as their passwords, or users who reuse passwords across different sites. According to the Verizon Data Breach Investigations Report, stolen credentials are involved in nearly 50% of all data breaches. If those users work for you, that’s not good news. It means you’re one credential leak or phishing attempt away from unauthorized access to your systems.

What’s the risk of an exposed credential? That depends on the credential type. Privileged access credentials, which grant administrative access to devices and systems, pose a significantly higher risk than basic user credentials. The credentials that allow servers, devices, and security tools to integrate would be devastating in the hands of an attacker.

A brute force attack takes a different approach. This attack utilizes automated scripts that systematically attempt thousands of password combinations until one is found that works. A brute-force attack can test millions of combinations in minutes, making weak passwords extremely vulnerable. 

Implement multi-factor authentication to add a second layer of protection beyond passwords. Consider passwordless authentication methods for your most critical systems. These security measures dramatically reduce the risk of credential-based attacks.

Man in the middle (MITM) attacks intercept communications

A MITM attack occurs when threat actors position themselves between two communicating parties to intercept or alter their exchanges. The attacker may eavesdrop on conversations, steal data in transit, or inject malicious content into legitimate communications. Unlike active attacks that modify data, passive attack vectors like simple eavesdropping can go undetected for extended periods while criminals gather information that security teams never realize has been compromised.

These attacks often target users on public Wi-Fi networks or exploit weaknesses in network encryption. Employees connecting through an unsecured virtual private network or no VPN at all face heightened risk. To protect against man in the middle attacks, encrypt all sensitive communications and make sure your organization uses secure protocols. Train employees to avoid conducting business on unsecured public networks where attackers can more easily position themselves to intercept traffic.

Malicious insiders exploit their access

When you think of a bad actor, who do you think of? Do you think of the bad guys outside your organization, or do you think of someone who might work for your organization? There are criminals outside your company, but it’s potentially far more damaging when the threat comes from inside the house.

Malicious insiders are employees who expose private company information through privileged misuse. They use their legitimate access to hurt your company or make money by exploiting your data or networks. A successful attack from an insider can be particularly devastating because they already have trusted access. 

Detecting insider threats requires monitoring data access patterns and network behavior for anomalies. Know which employees have access to your most sensitive information and watch for signs of unusual activity. Sometimes the biggest threat to your cybersecurity sits inside your own walls.

Configuration errors create entry points

Not all insider threats are malicious. Some are simply mistakes. When a configuration error occurs, it can leave an organization vulnerable to cyber threats. If an Amazon Web Services bucket is misconfigured, that can leave valuable data open to the public internet, and your organization will never know who has seen that data.

One mistake can leave sensitive information accessible to anyone online. Implement processes to verify that every aspect of your network is configured correctly. Strong security policies help prevent these errors by establishing clear standards for system configuration. Regularly audit your configurations and utilize automated tools to identify deviations from your security baselines. Following these best practices helps prevent accidental exposures that unnecessarily expand your attack surface.

Weak encryption invites trouble

If you’re sending unencrypted data, you could be inviting a problem. Data encryption converts your information into a form that only individuals with access to a secret key or password can read. The purpose is to protect your data during storage or transmission between networks.

When there’s no encryption or weak encryption, a bad actor who has hacked into a system can simply read your sensitive data. Strong encryption protects information security even when attackers gain access to your systems. Apply encryption to data both at rest and in transit, paying special attention to customer records, financial data, and intellectual property.

Web application vulnerabilities

Web application attacks target your enterprise’s internet presence. They often focus on e-commerce sites but can target any web application. These attacks include SQL injection and cross-site scripting, attack methods focused on particular goals such as repurposing the web app for malware distribution.

Your web applications represent another common entry point for attackers looking to steal data or compromise your systems. Criminals actively scan for opportunities to exploit vulnerabilities in outdated software, unpatched systems, and poorly coded applications. Prevent these attacks by using web application firewalls, utilizing secure development practices, and monitoring for vulnerabilities. Your development and security teams should collaborate to integrate security into applications from the outset.

Remote workforce security gaps

Much of the workforce now works from home, working at least part of the time remotely. This has understandably caused security issues. Home wireless networks aren’t as secure as workplace networks. Your average home network typically lacks enterprise-grade firewalls, and some workers may use personal devices to access the network.

Threat actors have taken notice and are increasingly targeting these insecure endpoints as a means of gaining access to your enterprise. Remote workers connect from countless locations, each representing a potential entry point for cyber threats. Encourage employees to use a properly configured virtual private network when accessing company resources from outside the office. 

Address remote work risks by deploying endpoint security solutions across all devices that access your systems. Monitor endpoint health continuously and respond quickly when you detect potential compromises.

Third party and supply chain risks

Your vendors and partners can introduce cyber threats into your environment. When a supplier suffers a breach, attackers may use it to gain access to your systems through trusted connections. Third party attacks have become one of the fastest-growing threat vectors as threat actors recognize the value of compromising one vendor to reach many targets.

You can’t control your vendors’ security directly, but you can assess and monitor their risk posture. Understand which third parties have access to your sensitive information and evaluate their security practices before granting access. Continuous monitoring helps you identify problems before they affect your organization.

How threat intelligence strengthens your defenses

Staying ahead of threat actors requires more than reactive security. Threat intelligence offers valuable insights into emerging threats, active campaigns, and the tactics cybercriminals employ to target organizations like yours.

With effective threat intelligence, your security operations teams can anticipate attacks rather than simply responding after damage has occurred. Understanding which cyber threats target your industry helps you prioritize defenses and allocate resources where they’ll have the greatest impact on reducing cyber risk.

How SecurityScorecard helps protect your organization

Our security ratings platform continuously monitors your organization’s cybersecurity posture across ten risk factor groups, including endpoint security and application security. You get visibility into the attack vectors that put your organization at risk.

Beyond monitoring your own security, our platform helps you assess and track the cyber health of your vendors and partners. When a third party’s security posture changes, you’ll know immediately and can take action before their problems become yours.

Ready to strengthen your defenses against today’s cyber threats? Create a free account to see your organization’s security rating and discover the attack vectors that deserve your attention.