303
Microsoft ’s updates for the Meltdown microprocessor mega-flaw inadvertently left users running Windows 7 64 - bit systems open to a “ way worse ” flaw , a researcher has claimed .
 discover vulnerability: has claimed
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: has claimed