449
The open vulnerability was reportedly identified over a year ago by an independent researcher but USPS never patched it until this week , when Krebs on Security flagged the issue .
 patch vulnerability: never 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: never patched