Latest cybersecurity reporting from selected sources.

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 […]

Asahi Group Holdings, Japan's largest beer producer, has finished the investigation into the September cyberattack and found that the incident has impacted up to 1.9 million individuals. [...]

Allianz Life has completed the investigation into the cyberattack it suffered in July and determined that nearly 1.5 million individuals are impacted. [...]

After air passenger travel hit across the Atlantic, organized crime agency strikes Breaking The UK's National Crime Agency has arrested a man as part of an investigation into a ransomware attack that disrupted airports around the world last weekend.…

iiNet breach blamed on single stolen login, with emails, phone numbers, and addresses exposed Aussie telco giant TPG Telecom has opened an investigation after confirming a cyberattack at subsidiary iiNet.…

America's largest steel producer initially disclosed the breach in May and took potentially affected systems offline to investigation the intrusion and contain any malicious activity.

United Natural Foods, Inc. Launches Investigation, Confirms IT Systems BreachA cyberattack on United Natural Foods, the largest U.S. health food distributor and a key Whole Foods supplier, has disrupted the company's fulfillment operations, prompting a notification to law enforcement and a forensic investigation as it works to restore affected systems.

Landmark Admin has issued an update to its investigation of a cyberattack it suffered in May 2024, increasing the number of impacted individuals to 1.6 million. [...]

The newspaper company expects the investigation to take some time, but said in an SEC filing that it has not yet identified any material impact.

Trend Micro's investigation into the recent activity of Earth Simnavaz provides new insights into the APT group’s evolving tactics and the immediate threat it poses to sectors in the Middle East.

Trend Micro's investigation into the recent activity of Earth Simnavaz provides new insights into the APT group’s evolving tactics and the immediate threat it poses to critical sectors in the UAE.

Breakup Spotlights How Some Relationships Can Crumble After Attack, InvestigationCalifornia-based Graybill Medical Group physicians' practice says it's splitting up with its affiliate practice, Palomar Medical Group, which handles a variety of management services, because the firm allegedly provided an "inadequate" response to a cyberattack detected in May.

The Federal Bureau of Investigation (FBI) and the Cybersecurity and Infrastructure Security Agency (CISA) are alerting the public of false claims that the U.S. voter registration data has been compromised in cyberattacks. [...]

Two weeks before Russia invaded Ukraine in February 2022, a large, mysterious new Internet hosting firm called Stark Industries Solutions materialized and quickly became the epicenter of massive distributed denial-of-service (DDoS) attacks on government and commercial targets in Ukraine and Europe. An investigation into Stark Industries reveals it is being used as a global proxy network that conceals the true source of cyberattacks and disinformation campaigns against enemies of Russia.

China vehemently denies involvement UK Government has confirmed a cyberattack on the payroll system used by the Ministry of Defence (MoD) led to "malign" forces accessing data on current and a limited number of former armed forces personnel.…

HHS OCR Tells UnitedHealth Group it Will Scrutinize Co.'s HIPAA ComplianceFederal regulators have informed UnitedHealth Group that they have launched a full-fledged investigation into a potential massive compromise of protected health information stemming from the Change Healthcare cyberattack. A potential PHI breach could affect tens of millions of individuals.

A cyberattack on UnitedHealth Group subsidiary Optum that led to an ongoing outage impacting the Change Healthcare payment exchange platform was linked to the BlackCat ransomware group by sources familiar with the investigation. [...]

Black Basta ransomware claimed responsibility, but the company says its investigation is ongoing.

Austul USA, a military contractor, alerts law enforcement it quickly mitigated a recent cyberattack on its systems and that an investigation is ongoing.