I worked for Cisco during the time IoT was being pushed into everything. You don't want to know how bad it is. If I was malicious I could have easily written several backdoors into their products without anyone knowing. I wrote kernel code in their IOS operating system. There are no checks on that shit and the entire switching team does next to zero peer review on kernel security.

Yes, there products that (at the time) touched upwards of 95% of all packets sent over the Internet.