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A WhatsApp security vulnerability could allow attackers to crash the iOS app as soon as you answer a call , and could potentially be used to hack your iPhone … The Register reports that the flaw was reported to WhatsApp in August , and has been patched in the latest version – so you ’ll want to check for an update .
 patch vulnerability: has been patched
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: has been patched