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A Google Project Zero researcher has published a macOS exploit to demonstrate that Apple is exposing its users to security risks by patching serious flaws in iOS but not revealing the fact until it fixes the same bugs in macOS a week later .
 patch vulnerability: patching
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:
 patch vulnerability: patching