Latest cybersecurity reporting from selected sources.

iRhythm disclosed a cyberattack via third-party apps where patient and proprietary data was stolen, followed by a ransom demand. iRhythm Technologies is a U.S.-based digital healthcare company specializing in remote cardiac monitoring and arrhythmia detection. Its best-known product is the Zio, a wearable patch that continuously records a patient’s heart rhythm for up to several […]

Digital healthcare company iRhythm Holdings has disclosed a data breach after hackers stole patients' personal and health information stored on third-party-hosted business applications. [...]

The Oncology Institute disclosed a data breach tied to a third-party vendor, potentially exposing patient information after a 2025 cyberattack. The Oncology Institute has confirmed that patient information was impacted in a cybersecurity incident involving a third-party software provider. The healthcare network first disclosed the security breach in November 2025 while the vendor’s investigation was […]

A previously unknown threat actor has been observed targeting government and military entities in Southeast Asia, alongside a smaller cluster of managed service providers (MSPs) and hosting providers in the Philippines, Laos, Canada, South Africa, and the U.S., by exploiting the recently disclosed vulnerability in cPanel

Also, Europol Cracks DDoS Networks, Mythos Finds Bugs, France Portal HitThis week, scam compounds. Attackers exploit flaws pre-disclosure. A crackdown on DDoS-for-hire. No Mythos for CISA, yes for Mozilla. France ID portal breach. Israeli and Venezuelan critical infrastructure targeted. Russian hacking in Ukraine. An Apache flaw. A ransomware negotiator aided BlackCat.

Complaints Allege Tempus AI Lacked Consent to Use, Share Data With Pharma Cos.A healthcare artificial intelligence firm that sells genetic information from an acquired database holding the results of millions of screening tests faces multiple putative class action lawsuits in Chicago federal court. Genetic data resists attempts to de-identify it, plaintiffs say.

The Computer Emergencies Response Team of Ukraine (CERT-UA) has disclosed details of a new campaign that has targeted governments and municipal healthcare institutions, mainly clinics and emergency hospitals, to deliver malware capable of stealing sensitive data from Chromium-based web browsers and WhatsApp

Healthcare IT firm CareCloud has disclosed a data breach incident that exposed sensitive data and caused a network disruption lasting approximately eight hours. [...]

Also, Russian Signal Phishing, Iran-Linked Malware, Breaches in Spain and FranceThis week, Tycoon 2FA, Trio-Tech, messaging app spying and a ransomware broker sentenced. Iran-linked hackers. Mazda disclosed a breach. Oracle patched a flaw. North Korean actors weaponized VS Code, a Spanish port ransomware attack, a French teacher data breach and a healthcare firm victim surge.

AWS Researchers Find an Interlock Server Laden With ToolsRansomware hackers exploited a flaw with a maximum vulnerability score in Cisco firewall management software weeks before the networking giant disclosed the vulnerability in early March. The group has focused extensively on critical infrastructure sectors in North America and Europe.

Amazon's threat intelligence team has disclosed details of a "years-long" Russian state-sponsored campaign that targeted Western critical infrastructure between 2021 and 2025

Horizon Healthcare RCM Hints at Paying Ransom in Data Theft IncidentHorizon Healthcare RCM is the latest revenue cycle management software vendor to report a health data breach involving ransomware and data theft. The firm's breach notification statement suggests that the company paid a ransom to prevent the disclosure of its stolen information.

Incident responders suggested sweeping improvements following Active Directory database heist Exclusive Cybercriminals broke into systems belonging to the UK's NHS Professionals body in May 2024, stealing its Active Directory database, but the healthcare organization never publicly disclosed it, The Register can reveal.…

A recently disclosed critical security flaw impacting SAP NetWeaver is being exploited by multiple China-nexus nation-state actors to target critical infrastructure networks

Ascension, one of the largest private healthcare systems in the United States, has revealed that a data breach disclosed last month affects the personal and healthcare information of over 430,000 patients. [...]

HHS Laying Off 10,000 More People, Consolidating Divisions, Shifting PrioritiesThe U.S. Department of Health and Human Services announced a major restructuring and workforce reductions on Thursday. The changes disclosed so far include reshuffling units of HHS involved in healthcare sector cybersecurity response activities and HIPAA regulatory work.

A U.S. Army soldier who pleaded guilty last week to leaking phone records for high-ranking U.S. government officials searched online for non-extradition countries and for an answer to the question "can hacking be treason?" prosecutors in the case said Wednesday. The government disclosed the details in a court motion to keep the defendant in custody until he is discharged from the military.

Ransomware attacks have reached an unprecedented scale in the healthcare sector, exposing vulnerabilities that put millions at risk. Recently, UnitedHealth revealed that 190 million Americans had their personal and healthcare data stolen during the Change Healthcare ransomware attack, a figure that nearly doubles the previously disclosed total.  This breach shows just how deeply ransomware

UnitedHealth has revealed that 190 million Americans had their personal and healthcare data stolen in the Change Healthcare ransomware attack, nearly doubling the previously disclosed figure. [...]

The Computer Emergency Response Team of Ukraine (CERT-UA) has disclosed that a threat actor it tracks as UAC-0125 is leveraging Cloudflare Workers service to trick military personnel in the country into downloading malware disguised as Army+, a mobile app that was introduced by the Ministry of Defence back in August 2024 in an effort to make the armed forces go paperless