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Clop Ransomware Group Breaches University of Phoenix Data of 3.5 Million

Clop Ransomware Group Breaches University of Phoenix Data of 3.5 Million

First seen 30 Dec 2025, 12:17 UTC • •

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ThreatCluster AI
ThreatCluster •March 12, 2026 at 13:27 UTC

The University of Phoenix experienced a data breach affecting 3.5 million individuals, attributed to the Clop ransomware group exploiting a zero-day vulnerability in Oracle's enterprise software. The attackers accessed university systems between August 13 and August 22, 2025, but the breach was only detected on November 21, 2025.

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