Well this is sub-optimal. #cososec
Backdoored firmware lets China state hackers control routers with “magic packets”
The modified firmware used by BlackTech is hard to detect.

Hackers backed by the Chinese government are planting malware into routers that provides long-lasting and undetectable backdoor access to the networks of multinational companies in the US and Japan, governments in both countries said Wednesday.

https://arstechnica.com/security/2023/09/china-state-hackers-are-camping-out-in-cisco-routers-us-and-japan-warn/