Important Notice for Networks Using Zyxel Devices
If your business uses Zyxel routers or VPN devices, you should be aware of recent security incidents. These incidents can expose your company to major risks. The good news is that once Zyxel discovered the threat, they released patches to help protect users. Even if your system has been affected, there are steps you can take to secure your network and reduce damage.
Are You Using Zyxel Routers or VPN Gateways
Zyxel has reported widespread exploitation of several of their devices. The attacks mainly target Zyxel Unified Security Gateway, ZyWALL, and USG FLEX systems. These devices combine firewall and VPN functions, which makes them valuable targets for threat actors. If your network uses any of these products, you should verify that your systems are fully protected.
Attackers have been using hardcoded accounts to access devices remotely. They do not need to be anywhere near your system. They can be across the world and still reach your network. This means strong firewalls and updated settings are critical.
Common Symptoms of an Attack
Zyxel reports that users may see issues with VPN access, routing, traffic flow, and logging in. Slow systems, strange password errors, or changes in normal performance may also signal a breach.
If your computer or network behaves differently than usual, your system may be compromised. Attacks can cause connectivity problems, file access issues, and general slowness. Acting quickly can help contain the incident and reduce impact.
What Happens After an Attack
Zyxel notes that once attackers get inside, they often use stolen credentials to bypass authentication. They may create new user accounts and open SSL VPN tunnels. This allows them to move through the network without being noticed. When authentication is bypassed, the entire system becomes vulnerable.
Your network may be exposed to data theft or unauthorized file access. While this is serious, there are steps you can take to regain control and protect your information.
How Hackers Use Your Information
Zyxel has been working with third party researchers to learn how attackers use stolen data. They found several methods:
Use of Stolen Credentials
Attackers may use real login credentials taken from earlier security incidents. Even if patches were applied in the past, some attackers still used old stolen logins or created new ones inside the system.
Exploiting Authentication Weaknesses
Some devices were exposed to new authentication bypass problems. In these cases, older patches did not fully protect the system.
Since hackers can use many different techniques to exploit networks, it is important to take action right away.
What to Do After a Security Incident
If you suspect an attack, delete unknown admin and user accounts immediately. Removing unfamiliar accounts closes access points that attackers may be using. You should also consider installing the latest firmware patches. These patches strengthen your system and add new security features.
Zyxel has released several firmware updates that address these weaknesses. While these patches are an effective way to protect your system, some users may find them difficult to install without support.
Need Help Securing Your Network
IT security is essential for business operations. A single security incident can slow down your entire company. If you are unsure how to install patches or need guidance on next steps, our team at RSI is here to help. We can answer your questions and assist with both simple and complex IT security needs. If you want help installing firmware patches or reviewing your network for risks, our team is ready to support you.