A researcher discovered a flaw that combined with Microsoft Outlook and OLE which leads to steal the Password hash and eventually crash the windows system. OLE (Object Linking and Embedding) is a component document technology created by Microsoft that helps to dynamically link files and applications together. Microsoft Outlook is an email client that comes with Microsoft Office. Outlook includes the ability to send rich text (RTF) email messages. But with a rich text email, the OLE object is loaded with no user interaction.”]
Source: https://gbhackers.com/hackers-can-steal-password-hash/