TriZetto Provider Solutions
The Cognizant-owned provider of revenue management services to physicians, hospitals, and health systems, has started notifying certain healthcare clients about a recently identified cybersecurity incident on October 2, 2025, when suspicious activity was identified within a web portal used by some of its healthcare provider customers to access TriZetto systems. It is currently unclear how many of its healthcare provider clients have been affected or the scale of the data breach.
University of Hawaii Cancer Center
August 2025 ransomware attack involving the acquisition of the sensitive data of study participants occurred.
University of Hawaii Cancer Center, part of the University of Hawaii (UH) System, is located in the Kakaʻako district of Honolulu and is the only National Cancer Institute-designated center in the state. According to the cancer center’s press release and breach reports to state attorneys general, unauthorized access to its computer network was discovered on or around August 31, 2025.
The affected servers were isolated, and an investigation was launched to determine
the nature and scope of the unauthorized activity. University of Hawaii Cancer Center confirmed that a ransomware group had breached its network, encrypted files, and exfiltrated research files containing patient information. University of Hawaii Cancer Center said its electronic medical record system was unaffected; however, files were obtained that contained patients’ protected health information.
The majority of the stolen files related to a single research project. The review of those files revealed that some contained the Social Security numbers of research participants dating back to the 1990s. The University of Hawaii Cancer Center said that in the 1990s, Social Security numbers were used as patient identifiers; however, that practice has since been halted, and alternative identifiers are now used.
Due to the highly sensitive nature of the stolen data, UH made the difficult decision to engage with the threat actor. University of Hawaii Cancer Center said it worked with third-party cybersecurity experts to obtain a decryption tool to recover the encrypted data, and paid a ransom to prevent the publication of the stolen data. Assurances have been received that all of the stolen data has been deleted.
Petco
The pet product retailer revealed that an incorrect configuration of a software application allowed for accessibility without adequate restrictions. The company resolved the issue, but there was still data exposure.
University of Pheonix: 3.5M Individuals Impacted
The organization disclosed unauthorized access, affecting over 3.5 million, including students, applicants, and employees.
Breach cause: The Clop ransomware gang exploited a third-party provider’s system.