Think about everything connected to your business network right now. Laptops, phones, printers - most business owners could list those in thirty seconds. But what about the monitoring system managing the solar panels on your roof? Or the energy management software your installer configured three years ago and nobody has touched since? These platforms connect to the internet too, often permanently, and often with very little ongoing attention from anyone in the business.
Security researchers recently published details of a serious authentication vulnerability in a widely used solar energy monitoring platform. The flaw let them access connected devices without needing valid credentials - no stolen password, no brute force, just a fundamental failure in how the system checked who was trying to get in. The platform has since been patched. But the patch is not really the story here. The story is about an entire category of internet-connected systems that UK businesses have quietly accumulated over the past few years, often with no one specifically responsible for keeping them secure.
What an authentication flaw in a connected platform actually means
Authentication is the part of a system that checks you are who you say you are before letting you in. When that check is broken or missing, anyone who finds the right access point can walk straight through the door. In this case, researchers were able to reach the monitoring platform and the devices connected to it without going through any proper login process at all.
Once inside a platform like this, an attacker could potentially view device configuration, adjust connected hardware, or use that access as a foothold to explore whatever else sits on the same network. The exact impact depends on how the platform is set up and what else shares its network segment. But the entry point is real, and it requires no sophisticated attack - just the knowledge that the vulnerability exists.
Why UK small businesses are directly in scope
Solar panel installations across UK commercial premises have grown significantly over the past decade. Offices, warehouses, retail units, light industrial sites - the economics of commercial solar made sense for many businesses, and almost every modern installation comes with internet-connected monitoring software as standard. The installer sets it up, hands over a login, and most business owners never look at it again.
That is precisely the problem. As we have written about with building management systems, the moment any device or platform connects to the internet it becomes part of your attack surface, whether you think of it that way or not. Heating controls, access systems, CCTV, energy monitoring - all follow the same pattern. Installed for operational reasons, connected for convenience, and then largely forgotten from a security perspective.
A patch released is not a patch applied
This is where the practical problem sits for most small businesses. A vendor issuing a security fix is the beginning of the process, not the end. Whether that fix has actually been applied to your installation depends entirely on whether your original installer, your IT provider, or someone in your team has gone in and done it. You cannot defend what you cannot see - and for most small businesses, solar monitoring software is completely invisible to whoever manages their security.
There is also a broader visibility gap: many business owners do not know exactly which software platform their solar system uses, let alone whether it is currently on the latest version. That gap is not unusual, but it is worth closing.
What to check if your premises has solar monitoring
You do not need to pull the plug on anything. A few straightforward steps address the main risks:
- Find out what platform you are running. Contact your installer and ask specifically which software manages your solar monitoring, who is responsible for applying security updates, and when the platform was last updated.
- Review the credentials. Default or installer-set passwords on monitoring platforms are a well-known weak point. Change them to something strong and unique, and check whether the platform supports two-factor authentication.
- Ask about network segmentation. Ideally, operational technology like energy monitoring should not share the same network segment as your business data and computers. If yours does, talk to your IT provider about isolating it.
- Include it in your security reviews. Vulnerability scanning that covers your full network - not just your laptops - can surface issues like this before an attacker does. If your current security review does not include connected building systems, it needs to.
The pattern worth keeping in mind
This incident fits a clear trend. As more operational technology connects to the internet - solar, smart heating, access control, CCTV, energy management - the attack surface for a typical business grows in ways that traditional IT security does not automatically cover. Attackers are aware of this. A solar monitoring platform is a less obvious target than a business laptop, which in some cases makes it a less defended one.
Good security for a UK small business today is not only about protecting your computers. It is about understanding every device and platform that connects to your network, and making sure each one is maintained, updated, and checked on a regular basis. That starts with visibility.
If you are not confident you know everything that connects to your network right now, that is the right place to start. Vulnerability management is an ongoing discipline, and internet-connected building systems are firmly part of the scope.