When I was looking at lg-firmwares site, I've founds the newest KDZ which has probably the April security patch because it has been released in 19. 4. 2017. It is Singapore KDZ for ASIA. Is there anyone who has got this KDZ installed and can provide us more info?
The link to the KDZ's site is: https://lg-firmwares.com/download-file/?fileId=9416
Direct link: https://lg-firmwares.com/downloads/downloader.php?fileid=9416&hash=866939f4deb301d0d98d402b41eed7e5
The link to the KDZ's site is: https://lg-firmwares.com/download-file/?fileId=9416
Direct link: https://lg-firmwares.com/downloads/downloader.php?fileid=9416&hash=866939f4deb301d0d98d402b41eed7e5