According to a good article in Which? some TP-Link routes and cameras need a firmware update to fix vulnerabilities which could allow attackers to gain unauthorised privileged access to your device. The article gives more details.
However, this raises the bigger question of how often you check the firmware on routers and other devices. According to a recent NCSC report, outdate firmware poses a very real risk. Those organisations with Cyber Essential’s accreditation will know that a consideration of this is part of the annual reaccreditation process, but it really should be checked more than once a year. Reputable manufacturer websites should show the latest firmware revisions, and provide information on how to update your devices.