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Breach Reports

Detailed cybersecurity breach reports with severity analysis, attack vectors, and records affected.

AZ Monica Hospital — Ransomware Attack Disrupts Patient Care Across Belgian Healthcare

critical

A ransomware attack on AZ Monica hospital in Antwerp forced cancellation of 70+ surgeries, patient transfers, and revealed a broader breach affecting five Belgian hospitals through a shared software supplier.

January 14, 2026 AZ Monicahospitalransomware

Blue Shield of California — Google Analytics Misconfiguration Exposes 4.7 Million Members

critical

Blue Shield of California disclosed that a Google Analytics misconfiguration shared protected health information of 4.7 million members with Google Ads over nearly three years.

January 5, 2026 Blue ShieldhealthcareGoogle Analytics

Sedgwick Government Solutions — TridentLocker Ransomware Breach

high

The TridentLocker ransomware group breached Sedgwick Government Solutions, a federal contractor subsidiary providing claims management to DHS, ICE, and CISA, exfiltrating 3.39 GB of data.

January 4, 2026 SedgwickTridentLockerransomware

European Space Agency — Hackers Claim 200 GB of Source Code and Credentials

high

A threat actor breached ESA's external Bitbucket and Jira servers, claiming 200 GB of source code, API tokens, credentials, and confidential mission documents. A second breach followed within weeks.

December 30, 2025 ESAspacesource code

Change Healthcare — ALPHV/BlackCat Ransomware Disrupts US Healthcare System

critical

The ALPHV/BlackCat ransomware attack on Change Healthcare caused the most significant disruption to the US healthcare system from a cyberattack, affecting claims processing for months and exposing data of approximately 100 million individuals.

December 15, 2025 ransomwarehealthcareALPHV

Snowflake Customer Data Theft Campaign — 165+ Organizations Compromised

critical

A credential theft campaign targeting Snowflake customer accounts without MFA resulted in data theft from over 165 organizations including Ticketmaster, AT&T, Santander, and Advance Auto Parts.

November 20, 2025 Snowflakecredential theftMFA

Salt Typhoon — Chinese State-Sponsored Espionage Infiltrates US Telecommunications

critical

The Salt Typhoon campaign by Chinese state-sponsored actors compromised major US telecom providers including AT&T, Verizon, and T-Mobile, accessing lawful intercept systems and call metadata in what officials called the worst telecom hack in US history.

October 15, 2025 Salt TyphoonChinaespionage

Synnovis/NHS — Qilin Ransomware Disrupts London Hospital Blood Services

critical

A Qilin ransomware attack on pathology provider Synnovis disrupted blood testing and transfusion services across major London NHS hospitals for months, forcing cancellation of thousands of operations and appointments.

October 1, 2025 ransomwareQilinNHS

National Public Data — 2.9 Billion Records Exposed, Company Files Bankruptcy

critical

Data broker National Public Data suffered a massive breach exposing 2.9 billion records including Social Security numbers, leading to class-action lawsuits and the company's bankruptcy filing.

September 10, 2025 data brokerSSNidentity theft

AT&T — Call and Text Records of Nearly All Wireless Customers Stolen

critical

AT&T disclosed that hackers stole call and text metadata for nearly all of its wireless customers — approximately 110 million people — from a Snowflake cloud environment.

September 1, 2025 AT&TtelecomSnowflake

MOVEit Transfer — Cl0p Mass Exploitation Affects 2,700+ Organizations

critical

The Cl0p ransomware group exploited a zero-day vulnerability in Progress Software's MOVEit Transfer, compromising over 2,700 organizations and exposing data of 95+ million individuals in one of the largest mass exploitation events ever.

August 20, 2025 MOVEitCl0pzero-day

Ticketmaster/Live Nation — 560 Million Customer Records Stolen

critical

Hackers stole personal and payment data of approximately 560 million Ticketmaster customers from a Snowflake cloud environment, in one of the largest consumer data breaches of 2024.

August 15, 2025 TicketmasterLive NationSnowflake
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UPDATED 2026-02-06
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