2826
The issue of publicly exposed printers is not new and has been exploited before to print rogue and sometimes offensive messages .
 ( discover vulnerability: been exploited,  print rogue and sometimes offensive messages: capabilities, printers: vulnerable system, The issue: vulnerability) 
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: been exploited,  print rogue and sometimes offensive messages: capabilities, printers: vulnerable system, The issue: vulnerability) 