WatchGuard Firebox Firewall Critical Vulnerability Alert: Update Now to Stay Safe

Hello everyone! If you utilize a WatchGuard Firebox firewall, you should pay attention. WatchGuard just reported a significant issue in certain Firebox firewalls that could allow hackers to control it remotely. Sounds scary!

What Is The Problem?​

This problem, CVE-2025-9242 is caused by a bug in Fireware OS which hackers could exploit to execute malicious code on your firewall. It mainly impacts people using IKEv2 VPN. Don’t think this can’t happen to you because your configuration is secure - there are still IKEv2 VPN settings that could be exploited. It’s worth reviewing.

Which Fireboxes Are Affected?​

While not every model has this issue, quite a few do:

Fireware OS 12.5.x: T15, T35

Fireware OS 12.x: T20, T25, T40, T45, T55, T70, T80, T85, M270, M290, M370, M390, M470, M570, M590, M670, M690, M440, M4600, M4800, M5600, M5800, Firebox Cloud, Firebox NV5, FireboxV

Fireware OS 2025.1.x: T115-W, T125, T125-W, T145, T145-W, T185

If your model is included in this list, you should be taking action now.

How To Fix It​

The positive note – WatchGuard has already issued updates to solve the problem. Revised versions are listed below:

• 12.3.1_Update3
• 12.5.13
• 12.11.4
• 2025.1.1

If you're unable to perform the update immediately, there is a temporary adjustment that you can make: disable some settings on your VPN and update firewall rules. It only takes a few minutes and is better than leaving your router's firewall open for hackers to exploit.

Why Act Fast​

Even if no one is reported to be exploiting this vulnerability yet, firewalls are the prime target. Hackers enjoy easy targets, and your router's firewall acts as the front door to your network. Do not risk it—do it today!

Final Thoughts​

Here's the bottomline: Check the model of your Firebox unit, update the software of your Firebox, and implement with temporary measures if necessary. You only need a couple of minutes to keep your network safe. Have you ever felt an uptick in your heart rate when you see a security warning? Trust me, I have. But taking your time and getting it done is great.