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Avast identified more than 22,000 webcams and baby monitors in the city that are vulnerable to attack , which means that cybercriminals could livestream the videos directly to the Internet .
 webcams: vulnerable system; baby monitors: vulnerable system; Avast: discoverer
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:
 webcams: vulnerable system; baby monitors: vulnerable system; Avast: discoverer