663
Google Project Zero 's security researchers have discovered another critical remote code execution ( RCE ) vulnerability in Microsoft ’s Windows operating system , claiming that it is something truly bad .
 discover vulnerability: have discovered
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: phishing, data breach, ransom, discover vulnerability, patch vulnerability 
Text: {0} 
Answer:
 discover vulnerability: have discovered