688
When you ’re as ginormous a target as the global telecommunications industry , and you ’re sitting on a flaw as big as the one affecting its SS7 protocol , best not rely on “ security through obscurity ” .
 ( discover vulnerability: affecting,  flaw: vulnerability, SS7: vulnerable system, the global telecommunications industry: vulnerable system owner) 
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: affecting,  flaw: vulnerability, SS7: vulnerable system, the global telecommunications industry: vulnerable system owner) 