Data Breaches Intelligence
Confirmed and emerging data breach reports: compromised databases, exposed records, underground marketplace listings, and what the stolen data means for your organization.
Data Breaches — Archive & Latest
Kyushu Electric Data Loss: Physical Security Incident and Media Hardening Guide
10.9 million customers impacted by a lost drive. Defend against physical data exfiltration with these controls.
GrayRobinson Data Breach: Detecting and Containing Large-Scale PII Exfiltration
65k+ individuals affected by the GrayRobinson breach. Defenders must immediately hunt for mass data staging and egress indicators.
Healthcare Data Breaches: Gastro Health & Spokane Digestive Disease — Detection and Containment Strategies
Recent breaches at Gastro Health and Spokane Digestive Disease expose critical PHI. Here is how to detect and mitigate active data theft in healthcare environments.
DentaQuest Breach: Defending Against Mass PII Exfiltration in Healthcare
2.6 million accounts exposed in DentaQuest breach. Defenders must validate access controls and hunt for data exfiltration artifacts.
WFP SRA Breach: Defending Humanitarian Portals Against Data Exfiltration
600k+ Gaza households exposed in UN WFP breach. Defenders must act to detect data exfiltration and harden registration portals.
2026 Healthcare Data Breach Statistics: Strategic Defense and Remediation
Updated 2026 breach statistics confirm healthcare remains the top target. Defenders must prioritize identity security and segmentation.
La Perouse Data Breach: Third-Party PHI Exposure and Incident Response
La Perouse breach impacts 7 medical groups. Critical defense strategies for detecting and mitigating third-party data leaks.
ShinyHunters Data Leak: Charter Communications Incident Response and Detection Strategies
5M+ Charter customers impacted after ShinyHunters leak data. Immediate defensive steps required to mitigate exposure and fraud.
Charter Communications Breach: ShinyHunters Data Leak and Database Exfiltration Defense
42M records leaked by ShinyHunters. Defenders must audit web server permissions and monitor for database dumping.
Multi-Vector Threat Analysis: Trump Mobile Data Breach, FIFA World Cup Phishing, and CISA Supply Chain Response - Detection and Remediation Guide
Defenders must address three emerging threats: Trump Mobile customer data exposure, FIFA World Cup phishing campaigns, and evolving supply chain attacks per CISA warnings.
Data Broker Sentencing: 7M Elderly Americans' Data Exfiltration — Detection and Prevention Guide
7 million elderly Americans' personal data sold to scammers; learn detection strategies and hardening steps to prevent similar insider threats.
Charter Communications Breach: ShinyHunters, 4.9M Records, and Defending Against Credential Stuffing
ShinyHunters exposed 4.9M Charter accounts. Learn the TTPs, detection logic for API abuse, and hardening steps to prevent similar breaches.
Connecticut Medicaid Portal Breach: HUSKY Health Compromise and Defense Guide
22,500 Hartford HealthCare patients had PHI exposed via the Connecticut Medicaid portal. Detect and mitigate third-party web risks.
ShinyHunters Breach: 7-Eleven Data Exfiltration Detection and Hardening
185,000+ records exposed in 7-Eleven breach by ShinyHunters. Actionable detection rules and response steps for PII exfiltration.
Mission Community Hospital $1.55M Settlement: Breach Analysis and Healthcare Defense
Mission Community Hospital paid $1.55M to settle a data breach lawsuit. Analyze the compliance failures and harden your healthcare defenses.
Oncology Institute Data Breach: Defending Against Third-Party Supply Chain Compromises
Healthcare providers face immediate risks following the Oncology Institute breach. Defend your PHI against third-party vendor exposures like TriZetto.
Radiology Associates of Richmond Breach: Detecting and Containing PHI Exfiltration
266,000 individuals impacted by the theft of PHI at Radiology Associates of Richmond. Essential defensive strategies for healthcare data protection.
DocketWise Data Breach: 143,000 Records Exposed via Third-Party Access — Detection and Response
DocketWise breach exposes PII and PHI for 143,000 via partner repository access. Immediate IR guidance and detection strategies included.
Anatomy of a Data Breach: Strategic Defense and Incident Response Insights
Data breaches are inevitable. Learn critical incident response strategies, detection methodologies, and remediation tactics discussed in the Dark Reading virtual event.
Radiology Associates of Richmond Breach: 266K Records Exposed – Detection and Hardening
266K patients affected by RAR breach. Defenders must audit EHR access and block data exfiltration immediately.
Supply Chain Incident: Lumexa & FMRS Breaches — Third-Party Access Hardening & Detection
Vendor compromise impacted Lumexa Imaging and FMRS. Defenders must audit third-party access and detect mass data exfiltration.
NYC Health + Hospitals Supply Chain Breach: Third-Party Compromise and Data Exfiltration Detection
1.8M patients impacted by a third-party breach at NYC Health + Hospitals. Defend against vendor-based lateral movement and sensitive data theft.
Grafana Breach: Coinbase Cartel Attack — Detection, Investigation, and Hardening Guide
Grafana confirms breach after attackers claim data theft. Essential detection steps and mitigation guidance for defenders investigating exposure.
American Lending Center Breach: Detecting and Containing Encryption-Based Ransomware
123k individuals impacted by ALC encryption breach. Defenders must hunt for ransomware precursors and long-term persistence mechanisms.
OpenLoop Health Data Breach: 716k Records Exposed – Telehealth Defense & Hardening
716,000 individuals impacted by the OpenLoop Health data breach. Defenders must audit telehealth vendors and detect PHI exfiltration immediately.
March 2026 Healthcare Breach Analysis: 44 Major Incidents and Critical Defense Gaps
HHS reports 44 major healthcare breaches in March 2026. Defenders must audit PHI access controls and network segmentation to mitigate risks.
NVIDIA GeForce NOW Data Breach: Response Guidelines and Credential Stuffing Defense
NVIDIA confirmed a GeForce NOW data breach exposing Armenian user data. Defend against credential stuffing and audit endpoint exposure.
Healthcare Data Breaches: Defending Against PHI Exfiltration — Analysis of Recent Incidents
Recent breaches at Hematology Oncology Consultants, Southcoast Health, and Cunningham Prosthetic Care underscore the critical need for robust egress controls and PHI monitoring.
RXNT EHR Breach: Detecting Unauthorized Legacy Database Access
RXNT breach exposes millions of patient records. Detect anomalous EHR data access and credential stuffing targeting RXNT portals.
Instructure Data Breach: Edtech Security Detection and Response Guide
Educational institutions face PII exposure after Instructure breach. Defenders must act to detect data exfiltration and secure student records.
Instructure Data Breach: Detecting ShinyHunters Exfiltration & LMS Defense
ShinyHunters claims the Instructure breach. Detect data exfiltration and harden your Canvas LMS environment against extortion.
ShinyHunters Breach of ADT: 5.5M Records Exposed — Detection and Defensive Response
ShinyHunters stole PII of 5.5M ADT customers. Defenders must hunt for data exfiltration TTPs and validate web access controls.
Healthcare Data Breach Response: Analyzing Attacks on Florida Physician Specialists & Mile Bluff Medical Center
Recent cyberattacks on Florida Physician Specialists and Mile Bluff Medical Center highlight the urgent need for healthcare-specific defenses.
Alabama Ophthalmology Associates Data Breach: Class Action Settlement and Incident Response Strategies
Healthcare providers face renewed liability risks following the Alabama Ophthalmology Associates breach settlement. Key defensive takeaways for protecting PHI.
UK Biobank Data Breach: Detecting Medical Data Exfiltration and Third-Party Risks
500k UK Biobank records found for sale on Chinese e-commerce. Defenders must audit third-party access and detect large-scale data egress.
ADT Breach: ShinyHunters Legacy Credential Compromise and Data Exfiltration — IR Guide
ADT confirmed a breach exposing customer data after ShinyHunters exploited stolen credentials. Defenders must audit legacy access controls and hunt for mass exfiltration.
Caribbean Medical Center Encryption Incident: Ransomware Detection and IR Playbook
Encryption-based attack on Caribbean Medical Center exposes 92k records. Defend against ransomware with these specific detection rules.
Healthcare Data Breaches: Mindpath Health, Springfield Hospital, and Lone Peak Psychiatry — Detection and Response Framework
Recent breaches at Mindpath Health, Springfield Hospital, and Lone Peak Psychiatry expose PHI vulnerabilities. Immediate defensive actions required.
Substack Platform Breach: Defensive Measures for Account Takeover and Data Exposure
Substack confirmed unauthorized access to user data. Immediate defensive actions required to mitigate account takeover and phishing risks.
Cookeville Regional Breach: Detecting and Containing Encryption-Based Healthcare Ransomware
338K patients impacted by ransomware. Defenders must deploy detection rules for encryption behavior and harden healthcare environments immediately.
Basic-Fit Data Breach: Incident Response and Detection of Mass PII Exfiltration
1M Basic-Fit members exposed. Detect mass data exfil TTPs, audit database access, and secure web applications against unauthorized access.
ProxyCare, Oscar Health, and AccentCare Breaches: Defending Against Healthcare Data Exfiltration
Recent breaches at ProxyCare, Oscar Health, and AccentCare highlight critical PHI exposure risks. Defenders must prioritize access control and exfiltration detection.
Zendesk Support Breach at Hims & Hers: Third-Party Supply Chain Defense
Telehealth provider Hims & Hers exposed PII via compromised Zendesk tickets. Defenders must audit third-party SaaS access and data governance immediately.
How to Defend Healthcare Networks Against Costly Data Breaches and Litigation
Learn defensive strategies to protect PHI and prevent costly settlements like the $3.85M Cardiovascular Consultants breach.
Defending Against Large-Scale Healthcare Data Breaches: Lessons from Nacogdoches Memorial
Mitigate risks of massive data exfiltration in healthcare. Learn detection strategies for unauthorized access and PHI protection.
How to Protect EHR Environments Against Breaches: Lessons from CareCloud
Defend against EHR breaches. Learn critical monitoring, detection rules, and remediation steps to protect patient data.
How to Defend Against Healthcare Data Breaches: Lessons from the OpenLoop Incident
Analyze the OpenLoop Health breach. Learn critical defense strategies and monitoring tactics to secure patient data and telehealth infrastructure.
Defensive Strategies for Rising Healthcare Data Breaches: Lessons from Recent Incidents
Recent breaches at New Horizons and CWA Local 1180 highlight critical vulnerabilities. Learn detection and remediation strategies to protect PHI.
How to Defend Against Third-Party Healthcare Data Breaches
The Deaconess Health breach highlights risks in vendor partnerships. Learn how to strengthen third-party risk management and protect PHI.
Mitigating Insider Threats in Healthcare: Lessons from the NADAP Breach
The NADAP breach exposed 90k records. Learn defensive strategies, monitoring techniques, and remediation steps to protect against insider data exfiltration.
Showing 50 of 75 reports. Archive expands automatically as new intel is generated.
Every Data BreachesReport Includes SIGMA & KQL Detection Rules
Every intelligence briefing on this page includes at least one Sigma rule, a Microsoft Sentinel KQL hunt query, and an IOC check script — ready to drop into your SIEM. No paywall. No registration.