The federal Cybersecurity and Infrastructure Security Agency, better known as CISA, just refreshed its guidance on internet exposure. If you run a law, accounting, medical, dental, or engineering office, the topic sounds technical, but the idea underneath it is simple. Some of your systems may be reachable from the public internet right now, and you may not even know it. This post walks through what that means, why it matters, and the practical steps you can take to get ahead of it.
Why this matters right now
Many offices expose more than they think. A remote access tool, a security camera, an old server, or a piece of building equipment can end up reachable from anywhere in the world. Often no one set out to do that. It just happened over years of adding tools and moving offices.
The reason CISA keeps raising the point is that attackers no longer go hunting one company at a time. Instead, they run automated scans across the whole internet, looking for anything that answers. When they find a system, they check it for the easy ways in: a default password nobody changed, software that is out of date, or a setting left wide open. So the risk is not that someone singled you out. The risk is that an open door gets found by a tool that never sleeps.
What it means for your business
Picture the systems your office depends on every day. Your practice management software, your accounting files, your client records, and the tools your team uses to work from home all live on or connect through your network. If one of those connections is exposed and weak, it becomes a shortcut past everything else you have in place.
For a smaller firm, the stakes feel personal. A single exposed remote-access login can put client data, billing, and your reputation at risk in one afternoon. For regulated fields like healthcare and finance, an avoidable exposure can also turn into a compliance problem on top of the security one. The encouraging part is that this category of risk is one of the most preventable. You are not fighting a mystery. You are closing doors you can actually see once you go looking.
What you can do about it
CISA’s guidance boils down to a short, doable checklist, and none of it requires you to become a security expert.
Start by taking inventory of what is reachable from the internet. You cannot protect what you do not know about, so the first job is simply finding it. Next, remove anything that does not need to be exposed. If a system does not require outside access, the safest setting is off. Then secure what has to stay reachable. That means strong, unique passwords, multifactor authentication on every remote login, steady software patching, and a managed firewall, VPN, or gateway that funnels access through one controlled path. Finally, keep watching. Exposure creeps back in as new tools get added, so a routine check keeps the gains from slipping away.
You do not have to run that checklist alone. At Run Networks, we do this work for offices across Nebraska and Iowa every week. We find the exposure most teams never see, close the gaps, turn on the protections that belong there, and keep an eye on things so the fixes hold. In short, we keep your technology running and your data safe, and we follow up so nothing slowly drifts back open.
In short
CISA’s update is a healthy nudge to ask a straightforward question: what of ours is reachable from the internet, and does it need to be? Find it, turn off what you can, lock down the rest, and keep checking. Do those four things and you close off one of the most common ways offices get hit. If you would like a second set of eyes, we are happy to take a look.
Sources
CISA, Internet Exposure Reduction Guidance (updated 08/25/2026): https://www.cisa.gov/resources-tools/resources/exposure-reduction
CISA Cyber Hygiene Services: https://www.cisa.gov/cyber-hygiene-services
NIST and CIS Controls frameworks (referenced for password, MFA, and patching practices).
