On the 24th (Korean time), Apple released iOS 12.5.7 update for older iPhones and iPads.
Apple provides security patches when security vulnerabilities are found in older models whose OS upgrades have been discontinued.
“Fixed an issue that could allow arbitrary code execution when processing maliciously crafted web content,” Apple said in release notes.
The iOS 12.5.7 update supports ▲iPod touch ▲iPhone 5S ▲iPhone 6 ▲iPhone 6 Plus ▲iPad Air ▲iPad mini 2 ▲iPad mini 3 and can be installed through Settings > General > Software Update.