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The exploit , which has now been patched , affected customers banking with hundreds of financial institutions US - based financial services firm Fiserv has just fixed a flaw in its web platform that exposed the personal and financial details of a vast number of banking customers .
 patch vulnerability: has now 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 now been patched