664
If the flaw is not public knowledge and has not been patched , it makes no sense to hand a cybercriminal the keys to Windows user ’s machines .
 patch vulnerability: has not been patched
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:
 patch vulnerability: has not been patched