1625
According to cyber-security firms F5 , attacks started as soon as Cisco Talos researchers revealed the zero - day 's presence and several proof - of - concept exploits were published online .
 ( discover vulnerability: revealed,  zero - day: vulnerability, Cisco Talos researchers: 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: revealed,  zero - day: vulnerability, Cisco Talos researchers: discoverer) 