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Researcher Pedro Ribeiro of Agile Information Security found accessible admin accounts and command injection vulnerabilities in ZyXel and Billion routers distributed by TrueOnline , Thailand ’s largest broadband company .
 ( discover vulnerability: found,  command injection vulnerabilities: vulnerability, ZyXel: vulnerable system, Billion routers: vulnerable system, TrueOnline: vulnerable system owner, Researcher Pedro Ribeiro: discoverer, accessible admin accounts: vulnerability, Agile Information Security: 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: found,  command injection vulnerabilities: vulnerability, ZyXel: vulnerable system, Billion routers: vulnerable system, TrueOnline: vulnerable system owner, Researcher Pedro Ribeiro: discoverer, accessible admin accounts: vulnerability, Agile Information Security: discoverer) 