https://www.theregister.co.uk/2019/04/30/huawei_enterprise_router_backdoor_is_telnet/

A claimed "backdoor" in Huawei routers used in the core of Vodafone Italy's 3G network was, in fact, a routine implementation of Telnet.

The Bloomberg financial newswire reported this morning that Vodafone had found "vulnerabilities going back years with equipment supplied by Shenzhen-based Huawei for the carrier’s Italian business".