Updating firmware fore lynk sus modem
Asus recommends performing a factory reset of the router after updating the firmware, so keep this option in mind if you have any issues after.
Like any computer operating system, router and modem firmware may have vulnerabilities that can be exploited by malware.
Aerohive has released an advisory explaining under what circumstances their products are vulnerable to KRACK.
There is always small risk that a new firmware update can introduce issues that did not exist before.
This does illustrate why it is important to ensure that your modem and router firmware is kept up to date and if new versions are released by the manufacturer to install them where possible.
Whether updates are available will be indicated by the manufacturer on the product page for the particular model on the manufacturer's website.
The firmware on the Alcatel/Thomson/Technicolor Speed Touch series of modems can be upgraded, although it is a complex process to do so.
Speed Touch firmware can only be upgraded within the same version, due to hardware driver compatibility.