Thank you for contacting Huawei Ireland Customer Care Team.
Regarding your query, we understand your concern for the security matters, but we can assure you that cyber security and privacy protection are at the core of Huawei’s interest. At the moment there are no updates plan for the device, but you can keep an eye on PSIRT for security queries.
We trust the above information is of assistance to you. However, should you have any further queries, Please do not hesitate to get back in touch.
The update checker was a non-starter for me until I used it with firmware finder and bypassed having to use a micro+SD card in order to upgrade to EMUI 5. First, I picked the 2.5gb file option within firmware finder which is basically EMUI 5, picked the get an update using dns beta option. Added the dns address that firmware finder provided to my wifi settings by holding down your wifi, choosing modify network, tick advanced options, change settings to static, and then change the dns to the one provided by firmware finder. From there, it downloaded the file, but once finished it passed it on to Huawei's upgrader app and it took over from there. Just remember to remove the dns address from your wifi settings when finished. As I mentioned didn't need to use a SD card and once finished, checked the Huawei updator again and there was another small update available. I thought it was the easiest way to upgrade without having to do too many steps. Once the file was passed on to the Huawei upgrader, it did all the work.