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Microsoft Internet Information Services ( IIS ) 6.0 has a Zero Day vulnerability attackers leveraged last summer and is likely undergoing exploitation now , researchers said .
 discover vulnerability: said
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: said