Harbor Discovers Data Breach, Files Accessed Between July 25 and August 1, 2025
Harbor, a non-profit organization providing behavioral health services, discovered suspicious activity on its computer network on August 1, 2025.
Key points
- Suspicious activity discovered on August 1, 2025.
- Unauthorized access and data removal between July 25, 2025, and August 1, 2025.
- Compromised data includes personal, medical, health insurance, and financial information.
Connected intelligence
Signal brief
Follow the organization, likely method and potential impact to explore connected Shadow Tier intelligence.
- Published
- Aug 1, 2025
- Updated
- Jun 26, 2026
- Confidence
- Medium
- Evidence
- 2 sources
Structured assessment
Signal analysis
This analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.
Threat source
Watch exposure paths that could affect data, operations or third-party trust.
Business impact
- Impact area
- Confidentiality
- Likely asset
- User or customer data
Mentioned entities
Quick context
Questions about this signal
What happened in this signal?
Harbor, a non-profit organization providing behavioral health services, discovered suspicious activity on its computer network on August 1, 2025. An investigation confirmed that an unauthorized actor accessed and removed certain files from its network between July 25, 2025, and August 1, 2025. The compromised information may have included full name, Social Security number, date of birth, address, driver's license number, medical information, health insurance information, and financial information. Harbor began issuing public notifications on September 30, 2025.
When was this signal reported?
Shadow Tier lists Aug 1, 2025 as the signal date.
Which organization is connected to this signal?
Harbor is the organization connected to this public signal.
Explore HarborWhich sector context is relevant?
This signal is connected to healthcare cyber intelligence.
Explore healthcare cyber intelligenceRelated signals
Compare shared topics, actors and incident patterns before opening the full signal.
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Xsolis, which provides AI-powered utilization management to hospitals and health insurers, was breached through a single phishing email, exposing Social Security numbers, health insurance details, and medical treatment records across seven major hospital systems including Mayo Clinic. At least one organization — Rochester Regional Health — had ended its relationship with Xsolis in 2021, yet its patient data was still in scope at the time of the breach. Most of the 1.4 million affected had no idea the vendor held their information at all. Third-party vendor incidents now account for 58% of all healthcare data breaches, and this case is a concrete reminder that data deletion at offboarding is a risk control, not an administrative afterthought. The Klue breach reached LastPass customer data. Attackers used OAuth tokens stolen from Klue to access LastPass's Salesforce environment, exposing customer names, contact details, and support case records. 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