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Two years ago he discovered a pair of vulnerabilities in Tuxedo Touch , a home automation controller made by the company , that could have let an attacker unlock a house ’s doors or modify its climate controls .
 ( discover vulnerability: discovered,  a pair of vulnerabilities: vulnerability, let an attacker unlock a house ’s doors: capabilities, the company: vulnerable system owner, Two years ago: time, he: discoverer, Tuxedo Touch: vulnerable system, modify its climate controls: 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: discovered,  a pair of vulnerabilities: vulnerability, let an attacker unlock a house ’s doors: capabilities, the company: vulnerable system owner, Two years ago: time, he: discoverer, Tuxedo Touch: vulnerable system, modify its climate controls: capabilities) 