What has been reported
The Register reports a Broadcom Wi-Fi security flaw described as 16 years old that could allow an attacker to take control of an affected router.
According to the supplied summary, a researcher claims Broadcom knew about the flaw in 2018. The report says millions of devices may still be vulnerable. That is not a confirmed count of affected UK homes.
The title and summary do not name affected router models, explain the conditions needed for an attack, or establish which devices have received a fix. They also do not say whether attackers are currently exploiting the flaw.
What this means at home
Your router connects your home network to your broadband service. A security weakness in it can therefore matter to the phones, computers, cameras and other devices that use that connection.
However, this report does not establish that your router is vulnerable. It also does not show that a connected camera or smart-home device has its own version of the flaw.
Without further technical details, it would be wrong to assume that an attacker can reach an affected router from anywhere on the internet, or that they must be nearby.
What to check
Find your router’s model number, usually printed on its label, and check the manufacturer’s support information for security notices and firmware updates. Firmware is the software that runs the router.
If your broadband provider supplied it, ask whether that model is affected and whether any required update has been installed. Follow the provider’s or manufacturer’s update instructions.
If the router no longer receives security updates, discuss replacement options. There is not enough information here to recommend replacing a particular model or disconnecting your home network.