The last update for the iPhone 5S was iOS 12.4.8, released July 15, 2020. In the meantime, various vulnerabilities were found in e.g. Safari [1]. I don't believ

The last update for the iPhone 5S was iOS 12.4.8, released July 15, 2020. In the meantime, various vulnerabilities were found in e.g. Safari [1]. I don't believe all of that is backported into iOS 12.x. [1] https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=safari https://cve.mitre.org/cgi-bin/cvekey.cgi?keyword=safari