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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 .
 ( discover vulnerability: disclosed,  McAfee: discoverer, the bug: vulnerability, last Saturday: time) 
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: disclosed,  McAfee: discoverer, the bug: vulnerability, last Saturday: time) 