Users should update to latest version of Apple iOS to better protect their devices

Apple Releases Security Updates for iOS 12.5.4 | CISA

About the security content of iOS 12.5.4 – Apple Support

Security – Available for: iPhone 5s, iPhone 6, iPhone 6 Plus, iPad Air, iPad mini 2, iPad mini 3, and iPod touch (6th generation) … Impact: Processing a maliciously crafted certificate may lead to arbitrary code execution … Description: A memory corruption issue in the ASN.1 decoder was addressed by removing the vulnerable code.

CVE-2021-30737: xerub