Apple said on Thursday it has found “no evidence” a flaw in their Mail app for iPhones and iPads has been used against customers, and that it believes the flaw does “not pose an immediate risk to our users.” Reuters—iOS email exploitSan Francisco-based cybersecurity firm ZecOps on Wednesday detailed a flaw that it said may have left more than half a billion iPhones vulnerable to hackers. Zuk Avraham, ZecOps’ chief executive, told Reuters he found evidence the vulnerability was exploited in at least six cybersecurity break-ins On Thursday, Apple disputed Avraham’s evidence that the hack had been used against users....