recover internal storage data from soft bricked phone (No custom recovery, USB Debugging option NOT turned ON)

I have an YU Yuphoria (5010) **running on stock rom cm12 which it came with** and was working perfectly until yesterday I rebooted the device. Now when it powers up it goes on a **boot loop**. I have some photos of my newborn cousin in it which i really need. My problems are as follows: 1. *USB debugging not enabled*. Which means my phone is not detected by adb and I can't mount or pull data from my phone through adb commands. 2. *No custom recovery* has been installed and the phone is not rooted. So no way to mount internal storage through CWM or TWRP as the don't exist. 3. *Fastboot works fine* but no option to access internal storage from it and unlocking bootloader will wipe all my data. I tried all sorts of solutions but nothing worked because of problem 1 and 2. I really need those photos. Please help me out Thanks