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The company said in a statement that they heard of a " small number " of targeted attacks in the wild using the exploit " approximately one month ago , " and added that there were no widespread attacks until McAfee disclosed the bug publicly last Saturday .
 McAfee: discoverer; the bug: vulnerability; last Saturday: time
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:
 McAfee: discoverer; the bug: vulnerability; last Saturday: time