
Samsung Galaxy Tab E 8.0
The latest firmware for Samsung Galaxy Tab E 8.0 (SM-T377T) is T377TUVU1BQI5 with Android 7.1.1 (Nougat), released on September 10, 2017 for 1 region (CSC). Every official firmware build for SM-T377T, 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/T377TUVU1BQI5
All 3 builds in our database run Android 7.1.1 (Nougat). The newest build, T377TUVU1BQI5, was released on September 10, 2017. No new build has appeared for 111 months, so regular updates for this model have most likely ended.
Specifications of SM-T377, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

SM-T377V

SM-T378V

SM-T387V

SM-T365Y

SM-T385S
The newest firmware for SM-T377T runs Android 7.1.1 (Nougat): build T377TUVU1BQI5, released on September 10, 2017.
The latest build for SM-T377T, T377TUVU1BQI5, was released on September 10, 2017 (9 years ago).
SM-T377T has had no new firmware for 111 months, so regular updates have most likely ended.
Yes, all firmware files for SM-T377T are 100% official, original, and obtained directly from Samsung servers.
To flash SM-T377T, 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-T377T.