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Cisco Duo’s Multifactor Authentication Service Breached A third-party telephony service provider for Cisco Duo falls prey to social engineering, and the company advises customer vigilance against subsequent phishing attacks. Becky Bracken April 15, 2024 2 Min Read SOURCE: OLGA YASTREMSKA VIA ALAMY STOCK PHOTO A third-party provider that handles telephony for Cisco’s Duo multifactor authentication (MFA) … …