How Printers Can Compromise Your Network Security

John W. Harmon, PhD
Jul 30
3 min read

In an age where data breaches make headlines, many small and medium-sized businesses (SMBs) still overlook a critical piece of their network security: printers. Often seen as simple tools for producing documents, printers hold sensitive information and can act as entry points into your network if not properly secured. This post explores how unsecured printers pose risks to your cybersecurity and what actions you can take to reduce these threats.

Understanding the Printer's Role in Network Security

Printers today are more than just machines—they are essential network devices. According to a recent survey, 60% of SMBs use printers that are connected to the internet, many with features like wireless connectivity and built-in memory. While convenient, these features can make printers vulnerable to cyber-attacks. Hackers often see printers as easy targets, using them to infiltrate broader networks. Recognizing the security risks associated with printers is key to protecting your organization.

The Risks Associated with Unsecured Printers

Potential Data Breaches

Printers can retain sensitive data on their internal hard drives. For instance, a 2022 report found that 20% of businesses experienced data breaches through their printers. Documents printed today may be retrievable tomorrow if the device is compromised. This can include customer information, financial records, or proprietary business data.

Network Vulnerability

Printers equipped with IP addresses can be accessed remotely, so unprotected devices can serve as backdoors for attackers. A single compromised printer can allow hackers to access the entire network, posing risks to connected devices and sensitive information. In fact, Cybersecurity Ventures estimates that 60% of small businesses close within six months of a data breach.

Malware Distribution

Printers can also be infected with malware. Cybercriminals target vulnerabilities in printer firmware, uploading malicious software that spreads to other devices in the network. According to a study, 70% of organizations have experienced malware infections due to vulnerable network devices like printers.

Common Printer Vulnerabilities to Watch For

Default Passwords

Default passwords are a widespread vulnerability. A staggering 80% of users fail to change these settings, allowing easy access for hackers. Once inside, attackers can manipulate printer settings, intercept documents, or launch further attacks.

Outdated Firmware

Ignoring firmware updates can leave printers exposed. Many manufacturers issue updates containing critical security patches. Statistics show that about 50% of businesses do not apply these updates on time, leaving them susceptible to attacks that exploit unpatched vulnerabilities.

Open Network Ports

Printers use specific protocols requiring open network ports. However, unnecessary open ports can become targets for cyber threats. Experts recommend auditing network ports regularly and closing any that are not in use to enhance security.

Best Practices for Securing Printers

Change Default Credentials

To secure a printer, changing the default passwords should be the first step. Encourage all staff to create strong, unique passwords and to change them periodically. Using password managers can help maintain security without overwhelming users.

Keep Firmware Updated

Establish a routine for keeping printer firmware up-to-date. Regular checks for manufacturer updates are vital. A maintenance schedule can significantly lower the risk of malware or security breaches.

Network Segmentation

Isolate printers on a separate network to limit their exposure. By creating a segmented network, you can reduce the chances of a breach affecting sensitive data or other devices. This strategy can decrease the risk of lateral movement by cybercriminals.

Implement Access Controls

Strictly manage access to printers, granting permissions only to necessary personnel. Features like user authentication and secure printing require users to verify their identity before accessing sensitive documents, adding another layer of protection.

Monitor Printer Activity

Keep a close eye on printer activity to catch any unusual behavior early. Regularly reviewing activity logs can help IT teams act quickly when they detect unauthorized access attempts. Proactive monitoring is key in identifying potential security incidents before they escalate.

The Importance of Printer Security

Neglecting printer security can have severe repercussions for SMBs, including costly data breaches and operational disruptions. By recognizing potential vulnerabilities and implementing strong security practices, businesses can significantly lower their risk.

In an era where protecting sensitive information is crucial, printers should not be the overlooked devices in your digital strategy. Take proactive steps to secure your printers and ensure they do not compromise your network security. By being vigilant and informed, you can safeguard your valuable data from cyber threats.

Close-up view of a modern printer showing security settings — Close-up view highlighting printer security settings

Understanding and addressing the risks associated with printers allows SMBs to create a safer work environment and protect their critical data from cyber threats.