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But the operating system is riddled with serious security vulnerabilities that make it easy for a hacker to take control of Tizen - powered devices , according to Israeli researcher Amihai Neiderman .
 ( discover vulnerability: is riddled,  the operating system: vulnerable system, serious security vulnerabilities: vulnerability, take control of Tizen - powered devices: capabilities, Israeli researcher Amihai Neiderman: discoverer) 
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: is riddled,  the operating system: vulnerable system, serious security vulnerabilities: vulnerability, take control of Tizen - powered devices: capabilities, Israeli researcher Amihai Neiderman: discoverer) 