2457
“ For the last 12 days we ’ve been reviewing our logs to see if there ’s any evidence to indicate that a hacker was exploiting the bug before it was patched .
 ( patch vulnerability: was patched,  it: vulnerability, the bug: 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:
 ( patch vulnerability: was patched,  it: vulnerability, the bug: vulnerability) 