University of Hawaiʻi Cancer Center Ransomware Attack and Data Breach
A ransomware attack on the University of Hawaiʻi Cancer Center's Epidemiology Division compromised the personal information of approximately 1.2 million individuals.
Key points
- Ransomware attack targeted the Epidemiology Division servers.
- Approximately 1.2 million individuals were affected.
- Compromised data includes names, Social Security numbers, driver's license information, voter registration records, and health-related information.
Connected intelligence
Signal brief
Follow the organization, likely method and potential impact to explore connected Shadow Tier intelligence.
Organization
- Published
- Aug 31, 2025
- Updated
- Jun 25, 2026
- Confidence
- Medium
- Evidence
- 1 source
Structured assessment
Signal analysis
This analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.
Threat source
Watch ransomware, endpoint compromise and business interruption exposure.
Business impact
- Impact area
- Confidentiality, Availability
- Likely asset
- User or customer data
Mentioned entities
Quick context
Questions about this signal
What happened in this signal?
A ransomware attack on the University of Hawaiʻi Cancer Center's Epidemiology Division compromised the personal information of approximately 1.2 million individuals. The stolen data includes names, Social Security numbers, driver's license information, voter registration records, and health-related information. The incident was discovered on August 31, 2025, and affected servers supporting research operations, though clinical operations, patient care, and student records were not impacted. The university engaged with the threat actors and paid a ransom to obtain decryption tools and assurances of data destruction. Notifications to affected individuals were delayed until early 2026.
When was this signal reported?
Shadow Tier lists Aug 31, 2025 as the signal date.
Which organization is connected to this signal?
Uhcancercenter is the organization connected to this public signal.
Explore UhcancercenterWhich attack pattern is relevant?
This signal is connected to current ransomware incidents based on its reported incident context.
Explore current ransomware incidentsWhich impact area is relevant?
This signal is connected to data exposure and breach intelligence based on its reported consequences.
Explore data exposure and breach intelligenceRelated signals
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Japan’s Nikkei has confirmed a major data breach that potentially exposed the personal information of more than 17,000 employees and business partners after hackers infiltrated its internal Slack messaging platform. Australian privacy commissioner warns that the human factor is a growing threat as notifications caused by staff mistakes rose significantly even as total breaches declined 10% from a record high. Philippine bank BDO is shoring up its cyber security capabilities to protect its data and systems as it moves more services to the cloud and expands its physical presence into remote areas of the archipelago. The agency is working with IBM, the Government Technology Agency and the Cyber Security Agency of Singapore (CSA) to establish the full facts and ensure remedial measures are taken. 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Some 8,200 DBS customers – mostly holders of DBS Vickers trading accounts and Cashline loans – and around 3,000 Bank of China customers were potentially affected. A year earlier, in August 2024, a hacker who gained unauthorised access to Mobile Guardian , a mobile device management platform then deployed across Singapore’s schools, remotely wiped the iPads and Chromebooks of about 13,000 students from 26 secondary schools. The Ministry of Education subsequently removed the software from all student devices and terminated its contract with the supplier.
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CodeSecCon bridges the gap between dev and security. Discover best practices for secure coding, innovative risk-reduction tools, and safe AI integration to cultivate a true DevSecOps culture. Safely secure your apps! Xsolis breach exposes personal and health data of 1.4 million people Healthcare technology company Xsolis has disclosed a data breach impacting nearly 1.4 million individuals following a phishing attack. The Tennessee-based firm, which provides utilization management and revenue cycle solutions for healthcare providers, became aware of unauthorized access on January 22, 2026, after a phishing attack two days prior. The breach exposed personal and protected health information received from Xsolis’s hospital and payer clients, as reported by Security Affairs. The security incident, which occurred on January 20, 2026, allowed an unauthorized actor to acquire files containing sensitive information. 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