IT Glossary
What is firmware?
The software embedded inside equipment — routers, printers, cameras, industrial machines — the layer nobody sees and most companies never update.
Every device in your building runs software, including the ones nobody thinks of as computers. Firmware is that software: written into the equipment itself, controlling how a router directs traffic, how a printer talks to the network, how a camera streams video, how a production machine executes a cycle. Unlike the applications on a laptop it rarely announces updates, has no visible interface, and continues working for years without attention — which is precisely the problem. Security researchers publish vulnerabilities in this equipment continuously, and the manufacturers publish fixes, but the fix only exists once someone installs it. The typical mid-sized company has a router that has not been updated since installation, several networked printers with default administrative passwords, and a camera recorder reachable from the internet running a version with a publicly documented flaw. That inventory is how attackers get inside networks that had a perfectly good firewall, and it is also why cyber-insurance questionnaires now ask about patch management on network equipment specifically. The remedy is unglamorous: know what you own, know who updates it, and know which devices no longer receive fixes at all.
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Why it matters for your business
The service doors closed
Patched network equipment removes the published vulnerabilities that attackers scan for continuously and exploit without any human target.
Equipment that behaves correctly
Updates fix defects as well as security holes, which resolves the intermittent faults that get blamed on the network for months.
Longer useful life per device
Supported devices gain features and compatibility over time, deferring replacement capital that would otherwise be spent early.
Frequently asked questions
How do we update firmware across company equipment?
Start with an inventory: every network device, its model, current version and who is responsible. Then schedule quarterly checks against manufacturer advisories, test on one device before the fleet, and always take a configuration backup first. Business-grade equipment usually offers central management that automates the whole cycle, which is one concrete reason to avoid consumer hardware in an office.
Can a firmware update break something?
Occasionally, yes — that is a real risk, not an excuse. Updates can reset settings, drop support for an old protocol something else depends on, or fail midway and leave a device unusable. Mitigation is routine: back up configurations, never update over a wireless connection, avoid updating everything on the same evening, and keep the previous version available where the manufacturer allows a rollback.
What do we do with equipment that no longer receives updates?
Treat end-of-support as a security event with a deadline, not a budget suggestion. Where replacement must wait, isolate the device on a separate network segment, block its internet access in both directions, change every default credential and monitor its traffic. An unsupported internet-facing device with a known vulnerability is not a risk to manage; it is an incident scheduled for later.
Let’s talk about your project
Message us on WhatsApp or send an email — you talk directly to a developer.
office@northdan.com · +40 752 070 247