The most common security mistake small businesses make
It isn't a sophisticated attack. It's usually something boring, avoidable, and free to fix.
When people imagine a cybersecurity incident, they picture something dramatic: a skilled attacker, custom malware, a targeted campaign. In our experience doing IT support and security work, most incidents that actually hit small and mid-sized businesses are much less exciting than that, and much easier to have prevented.
The single most common issue is reused or weak passwords with no second factor of authentication. One email account gets compromised, usually through a password reused from an unrelated breach somewhere else on the internet, and that one account becomes the way into everything else: file storage, banking, customer records. Multi-factor authentication on your important accounts closes most of this door for free, and takes a few minutes to set up.
The second most common issue is no real backup strategy. Not 'we have a backup' as an idea, but an actual, tested, working restore process that someone has verified recently. Ransomware and simple hardware failure both end the same way for a business without one: total loss, or a ransom payment as the only remaining option.
The third is unpatched software. Operating systems, plugins, and business software all receive security updates that fix known vulnerabilities. Skipping them because an update might break something familiar is a very common, very understandable choice that also leaves a known, documented hole open to anyone looking for it.
None of this requires an enterprise security budget. It requires someone responsible for actually doing it: turning on MFA everywhere it's offered, running a real backup schedule, keeping software current, and having a plan for when something does go wrong. That's most of what our managed IT and support work looks like in practice. Less firefighting, more of the boring maintenance that prevents the fire in the first place.