1526
The flaw came to light last year , after a report from security researcher Rotem Kerner .
 ( discover vulnerability: a report,  security researcher Rotem Kerner: discoverer, last year: time, The flaw: 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: a report,  security researcher Rotem Kerner: discoverer, last year: time, The flaw: vulnerability) 