
Samsung Galaxy E7
The latest firmware for Samsung Galaxy E7 (SM-E700F) is E700FXXS1BRK3 with Android 5.1.1 (Lollipop), released on December 11, 2018 for 8 regions (CSC). Every official firmware build for SM-E700F, 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/E700FXXS1BRK3
SM-E700F started on Android 4 and has received 1 major Android upgrade; it now runs Android 5.1.1 (Lollipop). The newest build, E700FXXS1BRK3, was released on December 11, 2018. No new build has appeared for 96 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-E700F runs Android 5.1.1 (Lollipop): build E700FXXS1BRK3, released on December 11, 2018.
The latest build for SM-E700F, E700FXXS1BRK3, was released on December 11, 2018 (7 years ago).
SM-E700F has had no new firmware for 96 months, so regular updates have most likely ended.
Yes, all firmware files for SM-E700F are 100% official, original, and obtained directly from Samsung servers.
To flash SM-E700F, 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-E700F.