MCBS data leak claimed by PEAR ransomware group
Data Leak
Summary
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A PEAR ransomware group leak made allegedly stolen MCBS files available for download, exposing personal, financial, HR, patient, payment, and email data. The leak is tied to an intrusion window of September 22-26, 2025 and affects 1,261,464 individuals. The publicly accessible dump raises the risk of identity theft, fraud, and secondary abuse of healthcare and business records.
Related Happenings
MCBS (Medical Computer Business Services) hit by ransomware attack
Incident
H score66
First: 27.07.2026 07:51
Last: 27.07.2026 07:51
Sources 1
How related:
threat actors had gained unauthorized access to its network between September 22 and 26, 2025.
About this happening:
MCBS disclosed a data breach after attackers accessed its systems from September 22 to September 26, 2025, putting 1,261,464 people at risk of stolen personal, h...
MCBS (Medical Computer Business Services) hit by ransomware attack
IncidentHow related: threat actors had gained unauthorized access to its network between September 22 and 26, 2025.
About this happening: MCBS disclosed a data breach after attackers accessed its systems from September 22 to September 26, 2025, putting 1,261,464 people at risk of stolen personal, h...
New York City Health and Hospitals Corporation hit by cyberattack
Incident
H score59
First: 18.05.2026 15:58
Last: 18.05.2026 15:58
Sources 1
About this happening:
The New York City Health and Hospitals Corporation disclosed a data breach that exposed sensitive records and affected 1.8 million individuals. Investigators found t...
New York City Health and Hospitals Corporation hit by cyberattack
IncidentAbout this happening: The New York City Health and Hospitals Corporation disclosed a data breach that exposed sensitive records and affected 1.8 million individuals. Investigators found t...
Erie Family Health Centers data leak exposing credentials and medical data
Data Leak
H score65
First: 18.05.2026 15:58
Last: 18.05.2026 15:58
Sources 1
About this happening:
Erie Family Health Centers disclosed a data leak that exposed 570,000 people and included credentials, financial information, and medical information. Inve...
Erie Family Health Centers data leak exposing credentials and medical data
Data LeakAbout this happening: Erie Family Health Centers disclosed a data leak that exposed 570,000 people and included credentials, financial information, and medical information. Inve...
Timeline
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27.07.2026 07:51 3 articles · 13d ago
MCBS data leak claimed by PEAR ransomware group
Initial DisclosureAttackers accessed MCBS systems over a four-day window in September 2025 and may have stolen files containing personal, insurance, and medical information.
Show sources
- MCBS Data Breach Affects 1.2 Million Individuals — www.securityweek.com — 27.07.2026 07:51
- MCBS Data Breach Affects 1.2 Million Individuals — www.securityweek.com — 27.07.2026 07:51
- Data breach at medical billing firm MCBS affects 1.26 million people — www.bleepingcomputer.com — 28.07.2026 12:10