The original article contains more details. Like the discovery of a work around that enabled direct access outside the procedure that was agreed upon. Indeed there is no proof it was actually used, but why was it there in the first place? Something that was not logged does not mean it did not happen. Actually, if it was my work I would make sure not to output something in local logs.
"it has never been established in all years that customer data was stolen by Huawei from our networks or our customer systems, or that it has been tapped."
Isn’t this basically the position that Ubiquiti took in the last few weeks?
There was a case where a backdoor was discovered on cisco devices.
It was a "bug", something a dev forgot. Sorry for that.
I am french and have zero trust in Chinese or US equipment but since we do not have our own (at least style that makes sense) I use theirs and hope for the best.