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Neiderman says a flaw in its design allowed him to hijack the software to deliver malicious code to his Samsung TV .
 ( discover vulnerability: says,  a flaw: vulnerability, Neiderman: discoverer, allowed him to hijack the software: capabilities, his Samsung TV: vulnerable system, deliver malicious code: capabilities) 
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: says,  a flaw: vulnerability, Neiderman: discoverer, allowed him to hijack the software: capabilities, his Samsung TV: vulnerable system, deliver malicious code: capabilities) 