
Samsung Galaxy Tab S2
The latest firmware for Samsung Galaxy Tab S2 (SM-T719) is T719XXS2BTJ4 with Android 7.0 (Nougat), released on December 8, 2020 for 3 regions (CSC). Every official firmware build for SM-T719, newest first: one row per build with all regions (CSC) that received it.
Each firmware build has its own page at https://samfirm.shop/build/{PDA}, where {PDA} is the build number from the list above. Example: https://samfirm.shop/build/T719XXS2BTJ4
SM-T719 started on Android 6 and has received 1 major Android upgrade; it now runs Android 7.0 (Nougat). The newest build, T719XXS2BTJ4, was released on December 8, 2020 with the January 2019 security patch. No new build has appeared for 71 months, so regular updates for this model have most likely ended.
Box codes of SM-T719 for different colors and markets. Firmware is chosen by the model code SM-T719 and your region (CSC), not by the SKU.

SM-T719C

SM-T710X

SM-T727A

SM-T810X

SM-T818V
The newest firmware for SM-T719 runs Android 7.0 (Nougat): build T719XXS2BTJ4, released on December 8, 2020.
The latest build for SM-T719, T719XXS2BTJ4, was released on December 8, 2020 (5 years ago).
SM-T719 has had no new firmware for 71 months, so regular updates have most likely ended.
Yes, all firmware files for SM-T719 are 100% official, original, and obtained directly from Samsung servers.
To flash SM-T719, you need to download the appropriate firmware, put your device into Download Mode, and use the Odin tool to load the BL, AP, CP, and CSC files.
Downgrading is only possible if the bootloader version (binary bit) of the old firmware matches the current one. Always check the binary version before flashing SM-T719.