It’s a scenario most property managers don’t think about until it’s too late.
A tenant calls. Their network was compromised. Customer data, maybe financial records, maybe personal information, was accessed by someone who shouldn’t have had it. And now they want to know one thing: how did this happen?
The answer might just trace back to your building.
If your property shares infrastructure, internet connections, Wi-Fi access points, building automation systems, or a managed network, the question of who’s responsible for a data breach becomes complicated fast. And in commercial real estate, “complicated” usually means expensive.
The Lines Are Blurrier Than You Think
Here’s what most building owners and property managers don’t realize: liability in a data breach isn’t just about whose server got hacked. It’s about whose network the attacker used to get in.
If a bad actor accessed a tenant’s systems through shared building Wi-Fi, an unsecured smart HVAC controller, or a property management platform with weak credentials, the building’s infrastructure is now part of the story. Depending on your lease agreements, your security posture, and what you knew (or should have known) about your vulnerabilities, you could be looking at anything from a costly legal dispute to direct financial liability.
This isn’t hypothetical. Building automation systems, the technology that controls lighting, climate, access control, and elevators, are increasingly connected to the internet and increasingly targeted by attackers. A compromised BAS doesn’t just disrupt building operations. It can serve as a back door into the wider network.
What Lease Agreements Usually Say (And What They Miss)
Most commercial leases include some language around network use and data security. But most of that language was written before buildings got smart and before cyber threats became a daily reality for every industry.
For owners and operators managing commercial real estate portfolios, whether a single office building or properties across multiple locations, this is an especially urgent problem. Your infrastructure touches more tenants, more systems, and more potential entry points than a single-tenant property ever would.
Standard lease agreements typically address things like:
- Who provides internet connectivity and how
- General acceptable-use policies for shared infrastructure
- Basic IT responsibilities between landlord and tenant
What they often don’t address is who bears responsibility when shared infrastructure becomes the entry point for a breach. That gap is where disputes and lawsuits tend to happen.
If your leases haven’t been reviewed with cybersecurity in mind, now is a good time to fix that. Work with legal counsel who understands both commercial real estate and data privacy law. The two disciplines don’t overlap naturally, but they need to.
The Negligence Question
Even if your lease language protects you from direct liability, there’s another exposure that’s harder to contract your way out of: negligence.
If a breach occurs and an investigation reveals that your building had known, unaddressed security vulnerabilities, outdated firmware on network equipment, unmonitored access points, default passwords on building systems, you may be found negligent for failing to take reasonable steps to protect the shared environment.
“Reasonable steps” is the key phrase. Courts and regulators look at what you knew, what you should have known, and what you did about it. Having no IT security program isn’t a defense. In many cases, it’s the liability.
This is particularly relevant for multi-site businesses and commercial real estate operators managing distributed properties. When the same network security IT gaps exist across multiple locations, so does the exposure.
How to Reduce Your Exposure
The good news is that most of the risk here is manageable, if you’re proactive about it.
Know what’s on your network. Every device connected to your building’s infrastructure is a potential entry point. Smart thermostats, IP cameras, badge readers, elevator controllers, they all need to be inventoried, monitored, and maintained.
Segment your network properly. Tenant traffic and building systems should never share the same network without clear, enforced boundaries. A properly segmented network limits how far an attacker can move if they do get in.
Keep systems updated. Outdated firmware and unpatched software are among the most common causes of successful attacks. This applies to building automation systems just as much as it does to computers.
Document your security practices. If something does go wrong, being able to demonstrate that you had a security program in place, that you were monitoring, patching, and managing risk, matters enormously when liability is being determined.
Work with a managed IT provider who understands your environment. Commercial real estate has specific infrastructure and specific risks. A generalist IT vendor may not know what to look for in a building automation context. Managed IT services for real estate and managed IT services for multi-site businesses are built around exactly these challenges, keeping every location monitored, updated, and protected under one consistent program.
The Bottom Line
A data breach in your building isn’t just a tenant problem. Depending on how it happened and what your security posture looked like, it can quickly become your problem too.
The organizations that come out of these situations cleanest are the ones that didn’t wait for something to go wrong before taking security seriously.
If you’re not sure where your building stands, that’s actually the most important thing to find out, and sooner is always better than later.
LG Networks provides managed IT support services in Dallas for commercial real estate owners, property managers, and operations-heavy businesses across the DFW area. As a trusted provider of managed services in Dallas and IT support in Dallas, we build the kind of security foundation that protects your tenants, your assets, and your liability exposure. Reach out to start a conversation.
