CenturyLink customers may have had data exposed in ‘security incident’. The company says the incident involving a third party vendor may have exposed contact information. GOLDEN VALLEY, Minn. — Some CenturyLink customers are receiving notifications about a recent “security incident” that may have compromised customers’ contact information. An email sent to customers states the “information security incident” involves a third-party vendor; as a result, customer information was “inadvertently made publicly accessible online,” possibly including names, addresses, phone numbers, email addresses and CenturyLink account numbers.