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EternalBlue is a " very fresh vulnerability " given that most breaches that use exploits leverage flaws that have been publicly known for an average of two years or more .
 discover vulnerability: known
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: known