Most small and mid-sized businesses do not think about network security until something goes wrong: a ransomware message, a hacked email account, or a customer asking uncomfortable questions. By then the damage is done. A regular network security review finds weak spots while they are still cheap to fix.
Here are seven signs that your business is overdue for one.
1. Your Equipment Has Not Been Updated in a Long Time
Routers, firewalls, switches, Wi-Fi access points, cameras, and servers all run software that needs security updates. Attackers actively scan for devices with known, unfixed flaws. If no one can say when your firewall or router was last updated, that is a red flag. Equipment that is no longer supported by its maker, often called end-of-life, no longer gets security fixes at all.
2. You Still Use Unsupported Software
Operating systems and applications eventually stop receiving security updates. Windows 10, for example, reached the end of its standard support in October 2025, so any computer still running it without paid extended updates is exposed to newly found flaws. Old accounting, point-of-sale, or line-of-business software on outdated systems is a common weak point.
3. Default or Shared Passwords Are Still in Use
Many devices ship with well-known default logins, and they are often never changed, especially on cameras, printers, and routers. Shared passwords for Wi-Fi, email, or software accounts are another sign. If several people use one login, you cannot tell who did what, and you cannot cut off one person without disrupting everyone.
4. No Multi-Factor Authentication
Stolen passwords are one of the most common ways attackers get in. Multi-factor authentication (MFA) asks for a second proof, such as a code or app approval, so a stolen password alone is not enough. If MFA is not turned on for email, remote access, and key business systems, it is one of the cheapest and most effective improvements you can make.
5. Everything Is on One Flat Network
On a “flat” network, guest phones, security cameras, printers, and your accounting computers all sit together. If one device is compromised, an attacker can reach the rest. Separating networks, for example guest Wi-Fi, cameras, and business computers, limits the damage from any single problem.
6. Former Employees or Vendors Still Have Access
When people leave, their email, software logins, VPN, Wi-Fi access, door credentials, and remote-support tools should all be turned off. Many businesses cannot say who currently has access to what. Old accounts that nobody watches are an easy way in.
7. You Have Never Tested Your Backups
Backups are your safety net against ransomware, hardware failure, and human error, but only if they work. Many businesses discover during an emergency that backups were failing, incomplete, or stored where ransomware could also reach them. A good setup keeps a copy offline or in an isolated location and tests restoring files on a regular schedule.
What a Network Security Review Covers
- Inventory: what devices and software are on your network, and who owns them.
- Firewall and router settings: open ports, remote access, and firmware versions.
- Wi-Fi: encryption, guest separation, and password practices.
- Accounts and access: user permissions, MFA, and old accounts.
- Updates and patching: operating systems, applications, and devices.
- Backups and recovery: what is protected and how fast you could restore.
- Physical security: network closets, cameras, and door access.
- Cabling and infrastructure: labeled, documented, and in good condition.
A good review ends with a clear, prioritized list: what to fix first, what can wait, and what it will cost.
Quick Wins You Can Do This Week
- Turn on MFA for email and any remote access.
- Change default passwords on routers, cameras, and printers.
- Remove accounts for people who no longer work with you.
- Put guests and cameras on their own network.
- Check that backups ran, and try restoring one file.
Security is not about being perfect. It is about making your business a harder target and being ready to recover quickly. This article is general information and not a guarantee of protection.
Want a Second Set of Eyes on Your Network?
Scio Info Tech provides IT security, network management, structured cabling, and CCTV for businesses across the San Francisco Bay Area, Sacramento, Los Angeles, and California. Tell us about your setup and we will help you find and fix the biggest risks first.
