
The latest firmware for GT-N5120 is N5120XXDOD1 with Android 4.4.2 (KitKat), released on March 31, 2015 for 1 region (CSC). Every official firmware build for GT-N5120, 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/N5120XXDOD1
All 11 builds in our database run Android 4.4.2 (KitKat). The newest build, N5120XXDOD1, was released on March 31, 2015. No new build has appeared for 140 months, so regular updates for this model have most likely ended.

GT-N7000B

GT-N5105

GT-N8020

GT-N8013

GT-N8005
The newest firmware for GT-N5120 runs Android 4.4.2 (KitKat): build N5120XXDOD1, released on March 31, 2015.
The latest build for GT-N5120, N5120XXDOD1, was released on March 31, 2015 (11 years ago).
GT-N5120 has had no new firmware for 140 months, so regular updates have most likely ended.
Yes, all firmware files for GT-N5120 are 100% official, original, and obtained directly from Samsung servers.
To flash GT-N5120, 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 GT-N5120.