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Google Project Zero 's security researchers have discovered another critical remote code execution ( RCE ) vulnerability in Microsoft ’s Windows operating system , claiming that it is something truly bad .
 ( discover vulnerability: have discovered,  Windows operating system: vulnerable system, remote code execution ( RCE ) vulnerability: vulnerability, security researchers: discoverer, Microsoft: vulnerable system owner, Google Project Zero: 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: have discovered,  Windows operating system: vulnerable system, remote code execution ( RCE ) vulnerability: vulnerability, security researchers: discoverer, Microsoft: vulnerable system owner, Google Project Zero: discoverer) 