Exploit broker Zerodium has announced a pay jump to 400,000 for zero-day vulnerabilities that allow remote code execution (RCE) in Microsoft Outlook email client.
Source
Microsoft Outlook RCE zero-day exploits now selling for $400,000

Exploit broker Zerodium has announced a pay jump to 400,000 for zero-day vulnerabilities that allow remote code execution (RCE) in Microsoft Outlook email client.
Source