Security experts have warned about a “high priority” risk to the TP-Link routers TL-WR940N (versions 2 to 4), TL-WR841N (8 to 10) and TL-WR740N (1 to 2). The US Cybersecurity and Infrastructure Security Agency said hackers are exploiting flaws in the routers to take control of home networks. TP-Link no longer releases security updates for the routers, which are all between 12 and 15 years old. If you use one, replace it immediately.