Latest cybersecurity reporting from selected sources.

Business Associates Tied to 50% of Breach Victims as AI-Aided Attacks LoomVendor incidents and hacks, especially data thefts and ransomware attacks, continue to plague the healthcare sector, accounting for the majority of major data breaches reported so far this year. The advent of AI tools in the hands of bad actors, will only heighten the threats, experts predict.

Reported Victim Tally in HCIactive's Health Data Theft Incident SoarsThe victim count in a 2025 hack against a Maryland-based firm that provides "AI-powered" administrative and technology services to healthcare practices soared to nearly 3.1 million nationwide, according to an updated breach report from Healthcare Interactive.

Healthcare data breaches are becoming more frequent but smaller in scale, targeting smaller entities and high-value credentials and records - and AI is reshaping both the attack landscape and fraud patterns, said Jim Van Dyke, senior principal of innovation at TransUnion.

Also: Medicare Data Breach; Gartner Security & Risk Management Summit TakeawaysIn this week's update, ISMG editors discussed Iran-linked hackers claiming to steal emails from Trump's inner circle, how to refine application development in the age of AI, and a U.S. Medicare data breach amplifying concerns over the safety, security and privacy of federal health systems.

Also: Turn in Volodymyr Kadariya, Get $2.5 Million from Uncle SamThis week, an ex-Verizon employee pleaded guilty, SonicWall fixed critical flaws,South Korean hackers exploited a zero-day, U.S. retailer Dick's Sporting Goods was breached, the U.S. government offered a big reward, Grok AI will send election queries to Vote.gov, and HIPAA is 28 years old.

Also: A Widespread Linux Bootloader VulnerabilityThis week, the U.S. banned AI robocalls, researchers discovered a Linux bootloader flaw, France investigated health sector hackings, the feds offered money for Hive information, Verizon disclosed an insider breach, Germany opened a cybersecurity center, and cyberattack victims reported high costs.

HealthEC Hack Also Compromised More Than a Dozen US Healthcare SystemsA hacking incident at a New Jersey-based vendor of artificial intelligence-enabled population health management services that involved a network server has affected more than a dozen of its healthcare clients across the country and nearly 4.5 million of their patients.