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Although researchers have uncovered problems with other Samsung devices in the past , Tizen has escaped extensive scrutiny from the security community , probably because it 's not widely used on phones yet .
 ( discover vulnerability: have uncovered,  problems: vulnerability, other Samsung devices: vulnerable system, researchers: discoverer, the past: time) 
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: have uncovered,  problems: vulnerability, other Samsung devices: vulnerable system, researchers: discoverer, the past: time) 