
Samsung Galaxy A7
The latest firmware for Samsung Galaxy A7 (SM-A700L) is A700LKLS1CRL1 with Android 6.0.1 (Marshmallow), released on December 4, 2018 for 1 region (CSC). Every official firmware build for SM-A700L, 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/A700LKLS1CRL1
SM-A700L started on Android 4 and has received 2 major Android upgrades; it now runs Android 6.0.1 (Marshmallow). The newest build, A700LKLS1CRL1, was released on December 4, 2018. No new build has appeared for 96 months, so regular updates for this model have most likely ended.
Specifications of SM-A700F, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

SM-A700X

SM-A707F

SM-A705YN

SM-A800X

SM-A715X
The newest firmware for SM-A700L runs Android 6.0.1 (Marshmallow): build A700LKLS1CRL1, released on December 4, 2018.
The latest build for SM-A700L, A700LKLS1CRL1, was released on December 4, 2018 (7 years ago).
SM-A700L has had no new firmware for 96 months, so regular updates have most likely ended.
Yes, all firmware files for SM-A700L are 100% official, original, and obtained directly from Samsung servers.
To flash SM-A700L, 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-A700L.