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CISA Warns of Active Exploitation of Widely Used Small Business VPN Appliances — Patch Available but Undeployed at Thousands of Sites

May 11, 2026 | News, Security

Illustration for: CISA Warns of Active Exploitation of Widely Used Small Business VPN Appliances — Patch Available but Undeployed at Thousands of Site

Small Businesses Beware: Your VPN Might Be Under Attack

Hey, small business owners. Have you heard about this latest threat to your network security? The government’s Cybersecurity and Infrastructure Security Agency (CISA) just issued a warning that hackers are actively exploiting a critical vulnerability in certain small business VPN/firewall appliances.

What Happened

CISA is sounding the alarm on a serious issue affecting small businesses. A widely used product called Sysax, which is part of Zyxel and DrayTek’s line of VPN/firewall appliances, has a critical vulnerability. Hackers are already exploiting this flaw to gain remote access to networks.

And here’s the kicker: there’s no patch available yet. We’re still waiting for a fix from the manufacturers. So, if you’re using one of these devices, you’re pretty much sitting ducks until they come up with something.

What This Means for Your Business

This is not just another security scare. The villain here is downtime and breaches caused by hackers exploiting this vulnerability. If your business relies on a Zyxel or DrayTek VPN/firewall appliance, you could be in real trouble. You might wake up one day to find that your network has been compromised, and your sensitive data is out there for anyone to see.

The cost of such an attack can be huge, from lost productivity to potential legal issues if customer data gets leaked. And it’s not just about the money; it’s about your reputation too. Customers will lose trust if they think their information isn’t safe with you.

What To Do This Week

  • Contact ACS to review your current setup and see if you’re using one of these affected devices.
  • If you are, ask us about alternative solutions that can keep your network secure until a patch is available.
  • Keep an eye on CISA’s updates for any new information or patches that might become available.

Don’t wait to find out the hard way. Let ACS be your guide through this tricky situation and help you stay in control of your network security.

Questions about how this affects your setup? Schedule a free IT consultation and we’ll walk through it with you.