The flaws threaten to expose corporate communications in Outlook as well as the messages of at-risk users like political dissidents.

Apple said it is working on a fix for the latest text bomb bug that crashes a number of iOS and Mac apps that display specific Telugu language characters.   

One of the bugs could allow a successful attack simply by a user viewing an email in Outlook’s Preview pane.

Microsoft patched three new Outlook vulnerabilities and re-released updates from a broken June update.