1657
He believes that many of the 40 flaws — called zero day exploits because there are no fixes and hackers could take advantage of them right now — were caused by Samsung coding errors that were never discovered in product testing
 discover vulnerability: were never 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: were never discovered