2424
Warning the device is susceptible to denial of service attacks , Cisco Systems on Wednesday released a patch for its NetFlow Generation Appliance .
 ( discover vulnerability: Warning,  the device: vulnerable system, denial of service attacks: capabilities) 
Locate the role in the text that participated in the event based on the event type and return it in the event list. 
 Option: Event type: phishing, data breach, ransom, discover vulnerability, patch vulnerability, Arguments type: vulnerable system, capabilities, vulnerability, number of victim, issues addressed, compromised data, damage amount, common vulnerabilities and exposures, victim, patch number, number of data, tool, discoverer, time, purpose, place, payment method, releaser, vulnerable system version, attacker, supported platform, patch, price, vulnerable system owner, trusted entity, attack pattern. 
Text: {0} 
Answer:
 ( discover vulnerability: Warning,  the device: vulnerable system, denial of service attacks: capabilities) 