Ad Tech Firm Optimizely Investigates Vishing Incident

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Optimizely Investigates Data Breach from Vishing Attack Optimizely, a New York-based ad tech firm, has confirmed a data breach resulting from a voice phishing (vishing) attack. The incident compromised some of its systems, affecting an undisclosed number of customers, including major brands such as H&M and PayPal. The company has begun notifying affected customers about the breach. 3 sources 33