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Microsoft released its Meltdown and Spectre patches on January 4 , a day after security researchers disclosed the two flaws , vulnerabilities that allow attackers to retrieve data from protected areas of modern CPUs .
 discover vulnerability: disclosed
Please tell me event type and its trigger word from given type options. Output format is "type: trigger".  Option: phishing, data breach, ransom, discover vulnerability, patch vulnerability 
Text: {0} 
Answer:
 discover vulnerability: disclosed