2994
The firm first disclosed the vulnerability to Netgear in April 2016 , initially it listing 18 vulnerable models , before listing 25 vulnerable models in a subsequent advisory .
 ( discover vulnerability: first disclosed,  The firm: discoverer, vulnerable models: vulnerable system, April 2016: time, Netgear: vulnerable system owner, the vulnerability: vulnerability) 
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: first disclosed,  The firm: discoverer, vulnerable models: vulnerable system, April 2016: time, Netgear: vulnerable system owner, the vulnerability: vulnerability) 