How to Secure Your Home Printer from Hackers

Every connected device in your home is a potential entry point for hackers. Your wireless printer, whilst often overlooked, can create a significant security gap in your network—especially if left with factory-default settings and unpatched firmware. For Kiwi households increasingly reliant on home office setups, understanding printer security has never been more crucial.

In this article, we’ll equip you with the knowledge needed to turn your printer from a liability into a secure part of your network infrastructure. You’ll learn actionable steps to prevent unauthorised access, secure your network connections, and implement best practises that protect your sensitive documents from cyber threats.

Why Printer Security Matters for Home Users

It’s easy to dismiss a printer as a mere output device, but modern printers are complex Internet of Things (IoT) devices running full operating systems. They’re capable of storing data, connecting to the internet, and communicating over your local network. This complexity makes them an attractive target for hackers.

Entry Point for Network Infiltration

An unsecured printer, particularly one with outdated firmware, can be exploited by attackers to gain access to your entire home network. Once inside, the attacker can move laterally to target more valuable assets, such as your computers, smartphones, and network-attached storage (NAS) devices.

Unauthorised Access to Sensitive Documents

Printers often have internal memory or hard drives that store a cache of every document printed—from tax returns and medical records to proprietary company reports. If an attacker gains access to the printer’s web interface or file system, they can steal this stored data, leading to identity theft or corporate espionage.

Data Interception During Wireless Printing

When printing over Wi-Fi, the data packet travelling from your computer to the printer is vulnerable. If your printer and network lack proper encryption (especially if still using deprecated protocols like WEP), a sophisticated adversary can intercept and capture print job data, revealing document contents in transit.

Printer Hijacking for Malicious Purposes

In worst-case scenarios, a compromised printer can be hijacked and weaponised. Attackers have used unsecured printers as a launchpad for Denial-of-Service (DoS) attacks against other targets or, more disruptively, to display malicious messages or print reams of junk data, incurring costs and rendering the device useless.

Common Printer Security Vulnerabilities

A security vulnerability is a flaw or weakness in a system that can be exploited by an attacker. For home printers, these vulnerabilities often stem from convenience features that prioritise ease of use over security. Knowing these weak points is the first step towards protection.

Generic or default administrator credentials (e.g., admin/password) are the most exploited flaws, allowing anyone on the network to hijack device control

Outdated encryption (WEP/WPA) makes it easy for nearby attackers to intercept network traffic, potentially exposing print jobs or the printer’s management interface

Neglected firmware updates leave the printer vulnerable to publicly known exploits that manufacturers have already patched

Unprotected ports (like 9100 or 631) can act as entry points for hackers scanning for vulnerable devices

Lack of SSL/TLS protocols causes management commands and print jobs to be transmitted unencrypted, exposing sensitive data to interception

Cloud-linked services introduce external connection points that can serve as network entry points if compromised

Essential Steps to Secure Your Home Printer

Securing your printer doesn’t require an IT degree, but it does require diligence and a few focused configuration changes. Whether you’re using an HP LaserJet for home office work or an HP DeskJet for everyday printing, these principles apply universally.

Change Default Passwords and Settings

The single most effective defence is eliminating the factory-set credentials.

Step-by-step guide to accessing printer settings:

1. Locate the IP Address: Print a configuration or network settings page using the printer’s physical control panel. The IP address will be listed (e.g., 192.168.1.15)

2. Access the Web Interface: Type this IP address into any web browser on a device connected to the same network. This opens the printer’s Embedded Web Server (EWS) or control panel

3. Log In: Use the default administrator credentials (check your printer manual for common defaults)

4. Navigate to Security Settings: Find the ‘Security,’ ‘Network,’ or ‘Administrator Settings’ tab

5. Change the Password: Create a strong, unique password using a combination of uppercase and lowercase letters, numbers, and special characters

Disable unnecessary default features:

Whilst in the EWS, look for options like Wi-Fi Direct (which creates a separate Wi-Fi hotspot) or Guest Access. If you don’t use them, disable them to reduce the attack surface.

Update Printer Firmware Regularly

Firmware updates are the security patches of the printer world.

Why firmware updates are critical:

Firmware updates fix known, published vulnerabilities (Common Vulnerabilities and Exposures, or CVEs). Failing to install them leaves exploitable weaknesses in your system.

How to check for and install firmware updates:

1. Go to the EWS (as described above)

2. Navigate to the ‘Management,’ ‘Tools,’ or ‘Firmware Update’ section

3. Select an option to check for updates online or download the latest file from the manufacturer’s website and upload it manually

4. Configure your printer or its accompanying desktop software to automatically check for and notify you of new firmware releases

5. If your model supports it, enable automatic installation

Secure Your Wireless Network Connection

Your printer is only as secure as the network it lives on. Strengthening the underlying connection is essential.

Use Strong Encryption:

Ensure your main home Wi-Fi network uses WPA3 (the current standard) or, at minimum, WPA2 with AES encryption. Avoid legacy WEP or WPA (TKIP) protocols entirely.

Implement Network Segmentation:

If your router supports it, place all your “less secure” IoT devices, including your printer, on a separate VLAN or Guest Network. This isolates them from your primary computers and file servers, preventing an attacker who compromises the printer from reaching your sensitive data.

Disable WPS:

Whilst convenient, WPS (Wi-Fi Protected Setup) has significant security flaws that allow brute-force attacks on the network PIN. Disable WPS on your router and printer.

Enable MAC Address Filtering:

As an extra layer of defence, configure your router to only allow the printer’s specific MAC address to connect. This prevents unknown devices from joining your network by impersonating the printer.

Enable Printer Security Features

Modern printers include features designed for network environments that you can also use at home.

Firewall Configuration:

Many printers have a basic, built-in firewall. Check the EWS security settings to ensure it’s enabled and configured to restrict incoming connections only to what’s necessary (usually your local network range).

Secure Printing Protocols:

Where possible, configure your printer to use IPP over HTTPS for printing, which encrypts print job data. If you use Simple Network Management Protocol (SNMP) for monitoring, use the encrypted SNMPv3 protocol.

PIN/Password-Protected Printing:

For highly sensitive documents, use the “Secure Print” feature. This holds the document on the printer’s internal storage until a PIN or password is entered at the physical control panel, preventing documents from being left unattended in the output tray.

Access Control Lists (ACLs):

Restrict which IP addresses on your network can access the printer’s management interface or send print jobs. Limit access only to your trusted home devices.

Disable Unused Features and Ports

To minimise vulnerabilities, apply the principle of least privilege by closing unnecessary network entry points.

Access the Embedded Web Server (EWS) to:

• Disable unused protocols like FTP or LPR/LPD

• Deactivate cloud printing to eliminate external access vectors

• Close common network ports (e.g., 9100 and 631)

• Disable remote management features to prevent unauthorised internet-based configuration attempts

Advanced Security Measures

For remote workers and users handling highly sensitive documents, these advanced techniques provide additional protection.

Setting Up a VPN for Printer Access

A Virtual Private Network (VPN) encrypts all traffic between your device and a secure network point. By configuring your router (if supported) to establish a VPN tunnel, you ensure that even local traffic destined for the printer is encapsulated in an encrypted channel. This is particularly valuable when printing from a laptop connected to an untrusted public Wi-Fi network.

Network Segmentation Strategies

Network segmentation extends the guest network concept by isolating devices into Virtual Local Area Networks (VLANs). By placing your printer on a dedicated IoT Network (VLAN 2) and keeping computers or NAS devices on a Management Network (VLAN 1), you prevent lateral movement. If the printer is compromised, the attacker is contained within the restricted IoT segment, unable to access sensitive data on your primary network.

Regular Security Audits

Treat your printer like any other network server. Periodically run a port scan (using tools like Nmap) on the printer’s IP address to check for unexpectedly open or unused network ports. This proactively identifies configuration drift or vulnerabilities that a firmware update may have introduced.

Monitor Printer Logs for Suspicious Activity

Modern printers maintain internal security logs accessible via the Embedded Web Server (EWS). Regularly audit these logs for:

• Unexpected reboots: May signal a firmware-level attack or security action

• Frequent failed login attempts: Indicate an active brute-force attempt on administrator credentials

• Unsolicited configuration changes: Often a definitive indicator of tampering

HP Security Solutions and Features

HP printers are resilient network endpoints that embed hardware-level security features designed to detect, protect, and recover from attacks.

HP Wolf Security for Printers

HP Wolf Security is a portfolio of security solutions that integrates hardware-enforced protection across the PC and printer ecosystems. It applies Zero Trust principles, meaning the device assumes its environment is hostile and rigorously validates every action.

HP Wolf Pro Security is often included with professional-grade HP printers suitable for hybrid or home office use, providing secure default settings and continuous, hardware-powered protection.

Self-Healing Security Features in HP Printers

This signature HP technology allows devices to defend themselves without human intervention:

HP Sure Start: Validates the BIOS (startup code) integrity at every boot. If corruption or a rootkit is detected, it automatically restarts with a secure, “golden copy” of the BIOS.

Whitelisting: Ensures only digitally signed, HP-approved firmware can execute. Any sign of tampering triggers an automatic reboot to a secure state.

Run-time Intrusion Detection (Memory Shield™): Monitors device memory in real-time for malicious injections. If an attack is detected, the printer isolates the threat and initiates a self-healing reboot.

HP Connection Inspector: Analyses outbound network requests for botnet activity. If the printer attempts to contact a malicious server, the feature forces a secure reboot to sever the connection.

Automatic Threat Detection Capabilities

The combination of features like Run-time Intrusion Detection and Connection Inspector gives HP printers an active threat detection posture. Instead of relying solely on signature-based detection (which can be slow), they use behavioural analytics to spot anomalies in code execution and network traffic, automatically neutralising even zero-day attacks by triggering an immediate, self-healing reboot.

Understanding Printer Security for Different Use Cases

Different printing scenarios require varying levels of security consideration. Understanding your specific needs helps you implement the most appropriate protection measures.

Home Office and Remote Work Security

For Kiwis working from home, business laptops and business desktops often connect to company networks via VPN. Your printer becomes an extension of your corporate infrastructure, requiring the same security rigour you’d apply to office equipment. Implement network segmentation, use secure printing protocols, and ensure firmware updates are applied promptly to maintain compliance with company security policies.

Family Home Printing Security

In households where multiple family members share a printer, security focuses on preventing external threats whilst maintaining ease of use. Prioritise strong Wi-Fi encryption, change default passwords, and consider using guest network isolation for the printer to protect personal computers and mobile devices from potential compromise.

Small Business Home-Based Operations

For small business owners operating from home, printer security directly impacts customer trust and regulatory compliance. Consider implementing access control lists to restrict printer access to authorised devices only, enable secure printing features for sensitive client documents, and maintain regular security audits to demonstrate due diligence in protecting confidential information.

Best Practises for Ongoing Printer Security

Security is an ongoing process, not a one-time setup. Maintaining a secure home printer requires continuous diligence:

• Update administrator credentials every 90 days to limit the utility of potentially stolen passwords

• Check for firmware patches semi-annually to stay ahead of known exploits

• Use a cross-cut shredder for documents containing personal identifying information (PII) or financial data

• Educate household members to recognise signs of tampering, such as unexplained rebooting or ghost print jobs

• Place devices in secure locations to prevent unauthorised data retrieval from the output tray

• Review security logs monthly for unusual activity

• Maintain an inventory of connected devices and their security settings

• Document your security configuration to ensure settings remain consistent after firmware updates or device resets

Complementary Security Measures for Your Home Office

Securing your printer is just one component of a comprehensive home office security strategy. Consider these additional measures to create a robust defensive posture:

Secure Your Computing Devices

Your HP laptops and desktops should employ similar security practises. Enable full-disk encryption, use strong passwords or biometric authentication, and keep operating systems and applications updated. Consider business-class devices that include advanced security features like HP Sure Start for BIOS protection.

Implement Proper Physical Security

Position your printer and other office equipment in areas of your home with controlled access. This prevents unauthorised individuals from physically accessing device controls, retrieving printed documents, or connecting USB drives that could introduce malware.

Regular Backup Procedures

Maintain regular backups of important documents stored on your computers. This ensures that even if a security incident occurs, you can recover your data without paying ransoms or experiencing significant business disruption.

Network Router Security

Your router is the gateway to your entire home network. Change its default administrator password, disable remote management unless absolutely necessary, and ensure it’s running the latest firmware. Configure your router to use WPA3 encryption and consider enabling features like intrusion detection if available.

Recognising and Responding to Security Incidents

Despite best efforts, security incidents can occur. Knowing how to recognise and respond to potential compromises is essential for limiting damage.

Warning Signs of a Compromised Printer

Watch for these indicators that your printer may have been compromised:

• Unexpected print jobs appearing in the output tray

• Printer rebooting without apparent cause

• Changes to security settings you didn’t make

• Unusual network traffic from the printer’s IP address

• Printer status page showing unknown connected devices

• Unexpected error messages or system alerts

Immediate Response Actions

If you suspect your printer has been compromised:

1. Disconnect from the network immediately to prevent further damage or data exfiltration

2. Document the incident by noting what you observed and when

3. Reset to factory settings to eliminate any persistent malware

4. Update firmware to the latest version before reconnecting

5. Change all passwords associated with the device and your network

6. Scan your network for other potentially compromised devices

7. Review security logs to understand the scope of the incident

Long-Term Security Improvements

After addressing the immediate threat, implement additional security measures:

• Conduct a comprehensive security audit of all networked devices

• Review and tighten network segmentation

• Implement more stringent access controls

• Consider upgrading to a printer model with enhanced security features

• Schedule regular security reviews to prevent future incidents

The Future of Printer Security

As cyber threats evolve, printer manufacturers continue to develop more sophisticated security capabilities. Understanding emerging trends helps you make informed decisions about future printer purchases and security investments.

AI-Powered Threat Detection

Next-generation printers are incorporating artificial intelligence and machine learning algorithms to identify and respond to threats in real-time. These systems can detect anomalous behaviour patterns that traditional signature-based security might miss, providing proactive protection against zero-day exploits.

Enhanced Authentication Methods

Future printer security will likely incorporate advanced authentication methods, including biometric verification and multi-factor authentication. These features will make it significantly more difficult for unauthorised users to access printer management interfaces or retrieve sensitive documents.

Integration with Home Security Ecosystems

As smart home ecosystems mature, printers will increasingly integrate with broader home security platforms. This will enable centralised security management, automated threat responses, and coordinated defence strategies across all connected devices in your home.

Conclusion

Modern home printers are networked devices that, if left unmanaged, can serve as entry points for unauthorised access. Securing these devices requires regular maintenance and implementation of standard security protocols, such as firmware updates and network isolation. Proactive management of these settings helps protect your sensitive data and ensures the integrity of your home office.

By following the practises outlined in this guide—from changing default passwords and updating firmware to implementing network segmentation and choosing security-focused printers—you can significantly reduce your vulnerability to cyber threats. Remember that security is an ongoing commitment, not a one-time task. Regular reviews, updates, and vigilance will keep your home printing infrastructure secure.

For New Zealand home office users, investing in quality HP printers with built-in security features provides peace of mind whilst handling sensitive documents. Whether you’re printing tax returns, client contracts, or family photos, knowing your printer is properly secured allows you to focus on what matters most.