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Explaining the details about the bug and the patch released , Microsoft states , “ To exploit this vulnerability , an attacker would first have to log on to the system .
 patch vulnerability: the patch released
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: the patch released