Data Breach News
June 23, 2026
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Klue hack results in data breach at several cybersecurity firms

TechCrunch reports: A hacking group has taken credit for a breach at market intelligence provider Klue that allowed hackers to steal reams of data from the company’s corporate customers, which include some of the biggest names in cybersecurity. Vancouver-based Klue, which lets companies conduct market research by connecting their data to its systems, said on Friday that […]

Data Breach News, News
June 23, 2026
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Two Members of Scattered Spiders Plead Guilty Over £39M TfL Cyberattack

HackRead reports that two hackers associated with Scattered Spider have pleaded guilty in the U.K. to some of their alleged crimes: Two young hackers, reportedly the members of the Scattered Spider hacking group, pleaded guilty under the Computer Misuse Act for their involvement in a £39 million cyberattack on Transport for London (TfL). Specifically, they admitted […]

Data Breach News, Malware Ransomware, News
June 21, 2026
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24 Billion Credentials Exposed in Major Infostealer Data Leak

Israeli Defense reports: Cybernews researchers discovered an exposed, publicly accessible database containing roughly 24 billion records and more than 8.3TB of sensitive data. The dataset appears to be one of the largest leaks ever uncovered, consisting mainly of stolen login credentials harvested from infected devices.  The leak, which was discovered on June 12, 2026 and […]

Cyberattack, Critical Infrastructure, Data Breach News
June 21, 2026
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Panic in Brazil after hacker triggers nationwide mobile alert

News AZ reports: Brazil’s government is investigating a suspected cyberattack after a bizarre, unauthorized emergency alert woke citizens across multiple states early Saturday morning. The country’s National Protection and Civil Defense Secretariat confirmed that the national notification system was completely shut down around 1:30 a.m. local time, News.Az reports, citing Reuters. The emergency shutdown was triggered immediately after […]

News, Data Breach News
June 19, 2026
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How a massive password-cracking operation spilled credentials for thousands of orgs

Ars Technica reports: Researchers have uncovered a massive breach of Fortinet firewalls that has given Russian-speaking attackers near-unrestricted access to some of the world’s largest and most powerful organizations, including Oracle, Chevron, Lenovo, Federal Express, a NATO defense contractor, and Fortinet itself. Nearly 74,000 Fortinet devices from more than 21,000 IP addresses in 194 countries […]

Data Breach News, News, Vendor News
June 18, 2026
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Nintendo responds after alleged third-party data breach: Our ‘systems have not been compromised’

Mashable reports: Nintendo of North America says it’s aware of what’s been described as a small third-party data breach affecting some of its employees. “Nintendo’s systems have not been compromised,” the company told Mashable in a statement, acknowledging that a third-party service was affected by an “issue.” Earlier this week, a hacking group calling itself ShadowByte$ […]

Data Breach News, Healthcare, Vendor News
June 17, 2026
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iRhythm discloses data breach, says hackers stole patient info

Bleeping Computer reports: Digital healthcare company iRhythm Holdings has disclosed a data breach after hackers stole patients’ personal and health information stored on third-party-hosted business applications. The company says its cardiac monitoring service has been used to analyze more than 2 billion hours of curated heartbeat data from over 12 million patients. In a filing with the […]

Data Breach News, News
June 16, 2026
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One threat actor demanded $50 million from Novo Nordisk. Another one demanded $25 million. Neither got paid.

DataBreaches.net reports that Novo Nordisk wasn’t attacked by just one criminal group but by two. The first group was FulcrumSec, who first contacted Novo Nordisk on June 1. After Novo Nordisk stopped responding to them, FulcrumSec leaked some of the data, providing DataBreaches.net with some exclusive material revealing how they approached the pharmaceutical giant. The […]