Old Cisco Router Flaw Being Exploited: Check If Your Home Internet Equipment Needs an Update

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has warned that hackers are actively exploiting a vulnerability in older Cisco IOS routers. This flaw, labeled CVE-2008-4128 (an industry tracking number for this software flaw), is from 2008 and affects older networking equipment. When exploited, it can allow attackers to trick the router into doing things without the owner's permission. This primarily affects people who have older Cisco routers, which are devices that provide internet connection to your home. Many families received routers from their internet service provider years ago and never replaced them.

If you have a Cisco router that is more than a few years old, it could be vulnerable. However, most modern home routers from internet providers or recently purchased equipment likely do not have this specific old flaw.

Here is what to do right now. First, check what router you have by looking at the device where your internet cable connects. Write down the brand and model number. Second, contact your internet service provider and ask if your router is up to date and secure. Third, if you own your router (rather than renting from your provider), visit the manufacturer's website and check for firmware updates. Fourth, if your router is more than five years old, seriously consider replacing it. Newer routers have better security and faster speeds. Routers are often the most neglected piece of technology in homes, but they are your front door to the internet.

Make it a habit to check for router updates twice a year. Set a reminder on your phone for January and July. Most modern routers can update automatically, so enable that feature if available. Keeping your router updated protects every device in your home that connects to the internet, from phones to smart TVs to computers.