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The networking giant said this week that an employee suffered a voice phishing attack that resulted in the compromise of select user data, including email addresses and phone numbers.
A third-party telephony service provider for Cisco Duo falls prey to social engineering, and the company advises customer vigilance against subsequent phishing attacks.
Attackers can spoof millions of email addresses to create targeted phishing attacks using flaws in Microsoft, GTX, and Cisco Secure Email Gateway servers.
Cyberattackers could exploit CVE-2023-20238 to carry out a variety of nefarious deeds, from data theft and code execution to phishing, fraud, and DoS.
Analysis shows attackers breached employee credentials with voice phishing and were preparing a ransomware attack against Cisco Systems.