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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 .
 The firm: discoverer; vulnerable models: vulnerable system; April 2016: time; Netgear: vulnerable system owner; the vulnerability: vulnerability
Given event type and trigger, please tell me the arguments of all the listed option. Output format is "name1: role1; name2: role2". 
Event type: discover vulnerability 
  Option: vulnerable system owner, vulnerability, capabilities, time, vulnerable system version, discoverer, common vulnerabilities and exposures, supported platform, vulnerable system 
Text: {0} 
Answer:
 The firm: discoverer; vulnerable models: vulnerable system; April 2016: time; Netgear: vulnerable system owner; the vulnerability: vulnerability