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Cisco 's Talos says they 've observed active attacks against a Zero - Day vulnerability in Apache 's Struts , a popular Java application framework .
 Talos: discoverer; a Zero - Day vulnerability: vulnerability; Struts: vulnerable system; Apache: vulnerable system owner; Cisco: 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:
 Talos: discoverer; a Zero - Day vulnerability: vulnerability; Struts: vulnerable system; Apache: vulnerable system owner; Cisco: discoverer