
Samsung Galaxy E7
The latest firmware for Samsung Galaxy E7 (SM-E7009) is E7009KES1AQA2 with Android 4.4.4 (KitKat), released on January 5, 2017 for 1 region (CSC). Every official firmware build for SM-E7009, 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/E7009KES1AQA2
All 9 builds in our database run Android 4.4.4 (KitKat). The newest build, E7009KES1AQA2, was released on January 5, 2017. No new build has appeared for 119 months, so regular updates for this model have most likely ended.
Specifications of SM-E700H, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

SM-E700M

SM-E500YZ

SM-E625F

SM-E5260

SM-E426S
The newest firmware for SM-E7009 runs Android 4.4.4 (KitKat): build E7009KES1AQA2, released on January 5, 2017.
The latest build for SM-E7009, E7009KES1AQA2, was released on January 5, 2017 (9 years ago).
SM-E7009 has had no new firmware for 119 months, so regular updates have most likely ended.
Yes, all firmware files for SM-E7009 are 100% official, original, and obtained directly from Samsung servers.
To flash SM-E7009, 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-E7009.