I also got a AK3918+SC1245 Mini IP Camera V380E
System app Version: AppV380E12_PCARD_V50_V2.5.5.2 20180901
System kernel Version: KerV380E12_PCARD_V50_V2.2.0 20160506
System firmware Version: HwV380E12_WF3_PCARD_V50 20160217
Ports 23(Telnet) and 554(rtsp) were closed.
Thanks to update posted by @sk8darr port 554 is open and RTSP is working and port 23 was open only til next reboot.
If you apply the update again - Telnet port will open again til reboot.
Unfortunately I could not login, so I modified the update to provide root shell on telnet
Unzip and copy files to an empty SD card . Use it on your own risk.