Table of Contents
The start of a new school year is the most critical period for K-12 cybersecurity. A sudden influx of users and unverified personal devices rapidly expands a school’s digital attack surface. These new students and staff are more vulnerable to phishing and social engineering attacks. Summer device updates and new technologies multiply the pressure. The total number of entry points a cybercriminal can exploit can become overwhelming for a small IT crew.
Before school starts again, IT teams must methodically secure their networks to protect sensitive student and financial data from ransomware and infostealers.
Lumu talked with two experts who have hands-on experience managing the start of term with schools: Andy Boell, Cybersecurity Director from Nebraska Cybersecurity Network for Education, and Gabe Stacy, CEO of Acture/CSI, a Managed Service Provider (MSP) in New York.
They emphasized that now is the time to act. Let’s explore their top tips.
Quick Facts: Securing K-12 Networks for the New School Year
|
What Are the Main Back-to-School Cybersecurity Threats?
Back-to-school cybersecurity threats include phishing, ransomware, and infostealers that exploit the sudden influx of new users and unverified devices on campus.
Andy says, “Schools are a very interesting animal compared to a non-education environment. In a bank or a hospital, for example, you don’t have to allow everybody who comes through the door to connect to your network. At a school, you do.”
Gabe echoed that sentiment, “You have all your normal threat vectors, like infostealers and ransomware, but multiplied by the fact you might have 500 people using the network: admins, students, teachers.”
Schools are a prime target for cybercriminals year-round. Lumu’s 2026 education report showed that threats like anonymizers, droppers, infostealers, and ransomware have schools’ health records and financial information in their sights.
A single click by an administrator on a fake invoice can trigger network-wide ransomware. Third-party vulnerabilities also pose risks, as highlighted by the recent Canvas breach.
Andy says the back-to-school period is a particular threat. “The first four or five weeks is the busiest time of the year. More users coming onto the network. Any changes during the summer? This is when things break or stop working.”
Gabe adds, “You have to worry about your devices, your network, and your security. There could be a new building on campus. You are giving out new devices. All sorts of things are at play.”
Andy explains that, “These IT tasks take the focus of the security director away from cybersecurity. As a cybercriminal, this is the best time to attack.”
So, what are the priorities for cybersecurity as students and teachers return to school after the summer?
What Are the Top Cybersecurity Priorities at the End of Summer Break?
The top cybersecurity priorities at the end of summer are strengthening your technology infrastructure and arming your staff. A strong pre-term plan divides your security checklist into tech priorities and people priorities for anything that comes their way.
Tech Priorities: How Should IT Teams Secure Their Digital Infrastructure?
IT teams must secure their digital infrastructure by hardening the network and addressing software vulnerabilities before students return. Back-to-school is about people, but technology is the foundation stone for learning. Addressing vulnerabilities now prevents attacks when you are busy with other things.
Why Is Patching Critical Before the Semester?
Patching is critical before the semester because it closes known software flaws before hundreds of new users log on. Update every system: servers, classroom computers, IoT, everything. Hackers exploit known flaws.
Gabe says, “Make sure your patches are in order. Get your firmware updates done over the summer. It will keep you safe throughout the year, when you’re probably fighting fires.”
To help teams focus their limited resources, tools like Lumu Discover pinpoint exposed network vulnerabilities with real-world exploit evidence, allowing IT personnel to prioritize the most critical patches first. Discover can also map your entire external attack surface, exposing unknown internet-facing assets and critical misconfigurations so your team can proactively defend the digital perimeter.
How Does Network Segmentation Protect Schools?
Network segmentation protects schools by separating student and guest networks from sensitive administrative systems. Isolating these networks can help contain a breach. Be sure to organize this before students and staff return.
Andy says, “Schools are unique as you need to educate everybody. That means you have to let everybody onto the network, and that may include hackers or bad guys. Network segmentation is essential. It stops people who are using the network from getting to sensitive areas.”
Implementing Lumu’s label feature allows schools to organize network traffic by specific user groups. To stop threats from spreading, Lumu monitors internal-to-internal, East-West traffic to actively spot lateral movement. When the engine flags this malicious activity, these labels help IT teams immediately pinpoint which segment contains the threat.
Why Must IT Teams Check Returning Devices?
IT teams must check returning devices because laptops taken home over the summer often return infected with malware. Andy says, “Many teachers take laptops home over the summer. The protections that it has during the school year, it may not have had during the summer. Every year a handful of those devices come back with a virus or some type of nasty software on there that has to be removed.”
Start this process early. Communicate with the staff and ask them to bring in their laptops early. Install Lumu’s ChromeOS Security Extension on all Chromebook devices to ensure you have visibility and strengthen your cyber stack.
How Can Schools Reinforce Access Controls?
Schools can reinforce access controls by requiring Multi-Factor Authentication (MFA) and enforcing the principle of least privilege. MFA protects accounts even when a password is stolen. Least privilege means that staff access only to the data they need for their job, and nothing more.
Create your rollout plan for this now. Enforcing these rules is much harder once the school year is underway.
Tech Priorities: How Should IT Teams Secure Their Digital Infrastructure?
IT teams must secure their digital infrastructure by hardening the network and addressing software vulnerabilities before students return. Back-to-school is about people, but technology is the foundation stone for learning. Addressing vulnerabilities now prevents attacks when you are busy with other things.
Why Is Patching Critical Before the Semester?
Patching is critical before the semester because it closes known software flaws before hundreds of new users log on. Update every system: servers, classroom computers, IoT, everything. Hackers exploit known flaws.
Gabe says, “Make sure your patches are in order. Get your firmware updates done over the summer. It will keep you safe throughout the year, when you’re probably fighting fires.”
To help teams focus their limited resources, tools like Lumu Discover pinpoint exposed network vulnerabilities with real-world exploit evidence, allowing IT personnel to prioritize the most critical patches first. Discover can also map your entire external attack surface, exposing unknown internet-facing assets and critical misconfigurations so your team can proactively defend the digital perimeter.
How Does Network Segmentation Protect Schools?
Network segmentation protects schools by separating student and guest networks from sensitive administrative systems. Isolating these networks can help contain a breach. Be sure to organize this before students and staff return.
Andy says, “Schools are unique as you need to educate everybody. That means you have to let everybody onto the network, and that may include hackers or bad guys. Network segmentation is essential. It stops people who are using the network from getting to sensitive areas.”
Implementing Lumu’s label feature allows schools to organize network traffic by specific user groups. To stop threats from spreading, Lumu monitors internal-to-internal, East-West traffic to actively spot lateral movement. When the engine flags this malicious activity, these labels help IT teams immediately pinpoint which segment contains the threat.
Why Must IT Teams Check Returning Devices?
IT teams must check returning devices because laptops taken home over the summer often return infected with malware. Andy says, “Many teachers take laptops home over the summer. The protections that it has during the school year, it may not have had during the summer. Every year a handful of those devices come back with a virus or some type of nasty software on there that has to be removed.”
Start this process early. Communicate with the staff and ask them to bring in their laptops early. Install Lumu’s ChromeOS Security Extension on all Chromebook devices to ensure you have visibility and strengthen your cyber stack.
How Can Schools Reinforce Access Controls?
Schools can reinforce access controls by requiring Multi-Factor Authentication (MFA) and enforcing the principle of least privilege. MFA protects accounts even when a password is stolen. Least privilege means that staff access only to the data they need for their job, and nothing more.
Create your rollout plan for this now. Enforcing these rules is much harder once the school year is underway.
Will Your District Pass the Pre-Term Cyber Readiness Exam?
Your school district will secure a passing grade on its pre-term cyber readiness exam by implementing these essential digital and human controls before the first bell rings.
The quiet summer months provide a fleeting window of opportunity to secure your digital environment. Once the back-to-school rush begins, IT teams have little time to spare for proactive defense. By hardening your network segmentation, updating your software patches, and establishing clear network visibility now, you prevent minor vulnerabilities from disrupting the entire academic year.
Do not wait for a crisis to test your preparations, protect your school with a clear plan. Contact Lumu today to learn how we work with K-12 schools to defend against these risks.