3451
According to FireEye , APT28 has exploited a number of known security flaws in the past including previously undiscovered " zero day " vulnerabilities in Adobe Flash Player , Java , and Windows .
 discover vulnerability: has exploited
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: has exploited