1533
McAfee researchers , who disclosed the zero - day 's presence , say they 've detected attacks leveraging this unpatched vulnerability going back to January this year .
 discover vulnerability: disclosed
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: disclosed