
Samsung Galaxy S6 edge
The latest firmware for Samsung Galaxy S6 edge (SM-G925A) is G925AUCU7EVG1, released on August 19, 2022 for 1 region (CSC). Every official firmware build for SM-G925A, 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/G925AUCU7EVG1
The newest build, G925AUCU7EVG1, was released on August 19, 2022. No new build has appeared for 51 months, so regular updates for this model have most likely ended.
Specifications of SM-G925F, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

SM-G925X

SM-G928A

SM-G920X

SM-G9298

SM-G935TZK
The latest build for SM-G925A, G925AUCU7EVG1, was released on August 19, 2022 (4 years ago).
SM-G925A has had no new firmware for 51 months, so regular updates have most likely ended.
Yes, all firmware files for SM-G925A are 100% official, original, and obtained directly from Samsung servers.
To flash SM-G925A, 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-G925A.