Vivo V5 Android Version 70 Update Portable !!exclusive!! Page
Note: The Vivo V5 originally shipped with Android 6.0 (Marshmallow) and officially received Android 7.0 via OTA. However, if you are referring to a "portable" update (e.g., moving it to another phone or a custom ROM), the tone changes. I have prepared two options based on what you likely mean.
How to Find the Latest Portable Stock Firmware (Android 6.0)
If you want a portable file to reinstall or repair your V5’s current Android version, download the official Marshmallow firmware: vivo v5 android version 70 update portable
This write-up explains how to install the Android 7.0 Nougat update on your Vivo V5 using a portable (TWRP-flashable) ZIP file. Note: The Vivo V5 originally shipped with Android 6
What's New in Android 7.0 (Nougat)?

