2420
As part of Unit 42 ’s ongoing threat research , we can now disclose that Palo Alto Networks Unit 42 researchers have discovered two code execution vulnerabilities affecting Adobe Flash ( APSB17 - 04 ) that were addressed in Adobe ’s monthly security update release : For current customers with a Threat Prevention subscription , Palo Alto Networks has also released IPS signatures providing proactive protection from these vulnerabilities .
 discover vulnerability: have discovered
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: have discovered