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Breach means unauthorized access to a computer system or network that exposes or steals sensitive data like personal details, passwords, or proprietary information. Attackers often exploit software flaws, weak passwords, or social engineering to gain entry. Breaches can also result from insiders misusing access or accidental data exposure.

Understanding breaches is crucial because they reveal weaknesses in security controls and can lead to data theft or operational disruption. Effective defenses include promptly patching vulnerabilities, enforcing strong authentication, and segmenting networks to limit attacker movement. Detecting breaches quickly through monitoring and logging helps contain damage and guide targeted remediation efforts to secure affected systems and data.

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The Company Will Start Notifying Individuals Affected by the Breach in Late JulyChange Healthcare says it has begun to notify customers whose data was compromised in the February ransomware attack that affected scores of healthcare providers, health insurance plans and other organizations. The company will begin to notify affected individuals in late July.

Bank Info Security 22 Jun 2024, 12:00 p.m. Breach Compromise Critical Infrastructure Hacking Healthcare Insurance Ransomware

Hackers Exploited Coding Error, Says Australian Communications and Media AuthorityHackers behind the leak of 10 million records from Australia's second-largest telecommunications carrier Optus exploited a vulnerability the company unwittingly inserted four years earlier into a web portal access control, said the Australian Communications and Media Authority.

Bank Info Security 22 Jun 2024, 9:00 a.m. Australia Breach Leak Vulnerability

Also: Critical Infrastructure Security and Fortinet's Latest AcquisitionIn the latest weekly update, ISMG editors discussed critical infrastructure security challenges, a report on the 2022 Medibank breach compromising personal data for 10 million people, and Fortinet's acquisition to integrate Lacework's cloud-native security into its Security Fabric and SASE platform.

Bank Info Security 22 Jun 2024, 5:00 a.m. Acquisition Breach Cloud Compromise Critical Infrastructure Fortinet MFA PII Report SASE

Also: Chinese Cyberespionage, Defiant Cleveland, and a Spanish Ransomware AttackThis week, ONNX targeted Microsoft 365, Symantec spotted Chinese espionage, AMD may have been breached, Cleveland vowed to defy hackers, Black Basta hit a Spanish firm, Pakistani hackers targeted India, Microsoft said it fixed flaws in Azure, and the U.S. and Indonesia held a cybersecurity exercise.

Bank Info Security 21 Jun 2024, 8:00 a.m. AMD America Antivirus Azure Black Basta Breach China Fixed Flaw India Indonesia Microsoft Phishing Ransomware Spain Symantec

Attackers Demanding Up to $5 Million to Delete Stolen Data, Investigators ReportAttackers who stole terabytes of data from customers of Snowflake have been not only offering the data for sale on data leak marketplaces but also extorting some of the victims, demanding a ransom of $300,000 to $5 million each, security researchers report.

Bank Info Security 21 Jun 2024, 6:30 a.m. Breach Leak Ransom Report Research Theft Victims

Breach Is Latest Major Cyber Incident Reported by a Medical Imaging ProviderA Minnesota-based radiology practice is notifying more than 500,000 individuals that their information was accessed and potentially acquired by hackers. The incident is one of several major health data breaches reported by radiologists in recent months as affecting hundreds of thousands of patients.

Bank Info Security 20 Jun 2024, 10:30 a.m. Acquisition Breach Hacking Healthcare Incident