
Samsung Galaxy K Zoom
The latest firmware for Samsung Galaxy K Zoom (SM-C115L) is C115LKLU0APA1 with Android 4.4.2 (KitKat), released on January 11, 2016 for 1 region (CSC). Every official firmware build for SM-C115L, 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/C115LKLU0APA1
All 3 builds in our database run Android 4.4.2 (KitKat). The newest build, C115LKLU0APA1, was released on January 11, 2016. No new build has appeared for 131 months, so regular updates for this model have most likely ended.
Specifications of SM-C115, a regional variant of the same device. Chipset and SIM lines are left out: they can differ by region.

SM-C900X

SM-C710X

SM-C701X

SM-C700X

SM-C500X

SM-C5560

SM-C115W

SM-C900Y
The newest firmware for SM-C115L runs Android 4.4.2 (KitKat): build C115LKLU0APA1, released on January 11, 2016.
The latest build for SM-C115L, C115LKLU0APA1, was released on January 11, 2016 (10 years ago).
SM-C115L has had no new firmware for 131 months, so regular updates have most likely ended.
Yes, all firmware files for SM-C115L are 100% official, original, and obtained directly from Samsung servers.
To flash SM-C115L, 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-C115L.