A single character message that comes seeking you could crash your Apple iPhone or iPad! The message comprises a character from an Indian language, Telugu. This single character, if received as a message or simply pasted in a text field, could cause an application crash or crash of the entire operating system. It could also lead to the crash of many popular apps such as WhatsApp, Facebook Messenger, WhatsApp, Gmail, and Outlook for iOS, as well as Skype and Telegram users. Apple released new versions of iOS, macOS and watchOS to fix the issue.”]
Source: https://hackercombat.com/a-single-character-message-that-can-crash-apple-iphone-ipad-or-mac/