872
This happened earlier this year , prompting a warning from Adobe in May after it was informed by researchers at ESET and Microsoft that they 'd discovered a malicious PDF using a zero - day remote code execution flaw in Reader with a sandbox - busting Windows privilege escalation flaw .
 discover vulnerability: discovered
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:
 discover vulnerability: discovered