
Samsung Galaxy Tab Pro 10.1
The latest firmware for Samsung Galaxy Tab Pro 10.1 (SM-T525) is T525XXUAOL6 with Android 4.4.2 (KitKat), released on December 21, 2015 for 2 regions (CSC). Every official firmware build for SM-T525, 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/T525XXUAOL6
All 15 builds in our database run Android 4.4.2 (KitKat). The newest build, T525XXUAOL6, was released on December 21, 2015. No new build has appeared for 132 months, so regular updates for this model have most likely ended.
Box codes of SM-T525 for different colors and markets. Firmware is chosen by the model code SM-T525 and your region (CSC), not by the SKU.

SM-T520

SM-T537A

SM-T530X

SM-T535

SM-T532
The newest firmware for SM-T525 runs Android 4.4.2 (KitKat): build T525XXUAOL6, released on December 21, 2015.
The latest build for SM-T525, T525XXUAOL6, was released on December 21, 2015 (10 years ago).
SM-T525 has had no new firmware for 132 months, so regular updates have most likely ended.
Yes, all firmware files for SM-T525 are 100% official, original, and obtained directly from Samsung servers.
To flash SM-T525, 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-T525.