Latest cybersecurity reporting from selected sources.

Breach Is Among Several Recent Major Incidents Involving Billing Software ProvidersA publicly traded cancer treatment firm notified investors that a yet-undisclosed number of patients' information was compromised in a 2025 cybersecurity incident involving a third-party billing software vendor. The Oncology Institute provides cancer treatment care to nearly 2 million patients.

Incident Involved an Unnamed Third-Party VendorNew York City's municipal healthcare system is notifying nearly 2 million patients of a hacking incident discovered earlier this year involving a third-party vendor. The breach compromised a long list of information, including biometric data such as fingerprints.

Web infrastructure provider Vercel has disclosed a security breach that allows bad actors to gain unauthorized access to "certain" internal Vercel systems

Compromise Affects Healthcare Clients of Co.'s Revenue Cycle Management ServicesBilling services vendor Trizetto Provider Solutions is notifying 3.4 million individuals of a hacking incident discovered in October 2025 that investigators have now determined started nearly a year earlier, when threat actors accessed the company's healthcare clients' insurance related data.

Incident Responders Detail Top Ransomware and Business Email Compromise TacticsThere's no need to invest into sophisticated hacking operations when moving fast and exploiting well-trod techniques gives threat actors all the access they want. Threat actors are prioritizing "low-complexity entry points, rather than investing in sophisticated exploits," say incident responders.

Insurer's Hack Could Rank as Largest US Health Data Breach Reported in 2025Supplemental health insurer Aflac is notifying 22.65 million people whose sensitive health and personal information, including Social Security numbers, was potentially compromised in a June data theft incident. The incident will likely rank as the biggest U.S. health data breach reported in 2025.

Insurer's Hack Could Rank as Largest US Health Data Breach Reported in 2025Supplemental health insurer Aflac is notifying 22.65 million people whose sensitive health and personal information, including Social Security numbers, was potentially compromised in a June data theft incident. The incident will likely rank as the biggest U.S. health data breach reported in 2025.

Largest Breach of 2025 Hits 10.5M People, Multiple Insurers, State AgenciesProposed federal class action litigation and various investigations are piling up against Conduent Business Solutions following its recent public disclosure that an October 2024 hacking incident potentially compromised personal and health information of more than 10.5 million people.

2023 Data Theft Affected Nearly 887,000 PatientsA radiology practice that has been serving patients in North Carolina for about 70 years agreed to pay more than $3.4 million to settle proposed class action litigation filed in the wake of a 2023 hacking incident that compromised the sensitive information of nearly 887,000 individuals.

Medication Tech Firm Says Hacking Incident Contained to One Employee Email AccountA Florida firm that offers medication therapy management services to health plans is notifying nearly 150,000 individuals that their information was potentially compromised in a phishing attack affecting one employee's email account for only about an hour. Why do users still fall for phishing scams?

Breach Affecting 104,000 Underscores Health Data Risks for Non-Healthcare FirmsAn Ohio hand tool manufacturer that sells its products through franchises is notifying nearly 104,000 people of a breach potentially compromising their medical data. The incident is a cautionary tale for non-healthcare sector entities about the risks they face involving health information.

Absolute Dental Says Breach Involved Third-Party Managed Services FirmA Nevada dental practice is notifying more than 1.2 million individuals of a hacking incident that compromised sensitive health and personal information. The incident involved "inadvertent execution of a malicious version of a legitimate software tool," said Absolute Dental.

Threat Actors Accessed, Stole Data for About 2 Months; BianLian Claims CreditA health system in rural Michigan is notifying nearly 140,000 people that their information was potentially compromised in a data theft incident occurring between November 2024 and January 2025. Cybercriminal gang BianLian lists Aspire Rural Health System as a victim on its dark website.

Clinical Diagnostics Lab Hack Among Latest Recent Cyberattacks in the NetherlandsA Dutch population health research agency is notifying 485,000 participants of a cervical cancer screening program of a hacking incident at a clinical diagnostics laboratory that potentially compromised patients' personal and health information, including lab test results.

At Least 410,000 Patients Reported Affected, But Likely Even More VictimsMonths after news first broke that a hacking incident compromised legacy patient data hosted by Cerner electronic health record servers that were set to migrate to parent company Oracle's cloud environment, data breach reports related to the hack are still slowly trickling in to regulators. What's taking so long?

Breach Victim Tally Soars Since Firm Filed an Initial Breach Report in Early AprilKelly Benefits is notifying nine large clients and nearly 264,000 individuals that their sensitive personal information was potentially compromised in a December data theft incident. The tally of affected people has climbed eight-fold since the company’s first estimate earlier this month.

Community Dental Care Is State's Largest Non-Profit Serving Medicaid PatientsMinnesota's largest nonprofit Medicaid dental practice is notifying nearly 135,000 people of a December 2024 data theft incident that potentially compromised their health and personal information, ranging from medical information to passport numbers.

Lawsuits Allege Cybercrime Gang Medusa Stole Data of 132,000 PeopleAn Arizona-based medical imaging practice with locations in 11 states is notifying patients that their data was compromised in a January cyberattack. Litigation filed against the company allege ransomware gang Medusa stole sensitive data pertaining to at least 132,000 people in the incident.

Customer Credentials Possibly Compromised at EHR Vendor Acquired by Oracle in 2022Oracle is dealing with a hacking incident involving legacy patient data of Cerner electronic health record customers. Oracle, which acquired Cerner in 2022, is reportedly telling clients the hack involved compromised credentials for systems scheduled to migrate to the cloud.

Incident Spotted in March 2024 Is Yet Another Attack Against Medical Billing FirmsA Nebraska-based firm that provides revenue cycle management and billing services to healthcare firms is notifying tens of thousands of people and an undisclosed number of companies that their personal, health and financial information was compromised in a March 2024 hack.