1065
The bug was unusually dangerous but of a common genre : it was in Microsoft software , could allow a hacker to seize control of a personal computer with little trace , and was fixed April 11 in Microsoft ’s regular monthly security update .
 patch vulnerability: was fixed
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: was fixed