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,  Samsung coding errors: vulnerability) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: phishing, data breach, ransom, discover vulnerability, patch vulnerability, Arguments type: vulnerable system, capabilities, vulnerability, number of victim, issues addressed, compromised data, damage amount, common vulnerabilities and exposures, victim, patch number, number of data, tool, discoverer, time, purpose, place, payment method, releaser, vulnerable system version, attacker, supported platform, patch, price, vulnerable system owner, trusted entity, attack pattern. 
Text: {0} 
Answer:
 ( discover vulnerability: were never discovered,  Samsung coding errors: vulnerability) 