1616
The new vulnerability affects Xen 4.8.x , 4.7.x , 4.6.x , 4.5.x , and 4.4.x and has existed in the Xen code base for over four years .
 discover vulnerability: affects
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: affects