Security news aggregator

Latest coverage for Breach

Stay informed on the latest data breach incidents and security breaches. Protect your information with our up-to-date breach news and analysis.

20 headlines in this view

Refine the feed

Search across headline titles and summaries.

Tag briefing

Background for this topic.

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.

Volume over time

Weekly headline count for the current query.

Showing 20 most recent headlines Filtered view

Ernst & Young (EY) disclosed a data breach after attackers compromised a third-party IT support system containing client documents and tax information. Ernst & Young (EY) is disclosed a data breach linked to a compromised third-party support ticket system used by its IT teams. The platform stored support requests that may have included documents containing […]

Chinese actors used Claude Code and DeepSeek to automate attacks that breached government systems and targeted financial firms. Hunt.io researchers stumbled onto an active intrusion campaign in June 2026 while pivoting on known TencShell command-and-control infrastructure. A single HTTP header fingerprint on port 1111 led them to 13 Hong Kong-based servers and, on one of […]

Lidl disclosed a third-party data breach affecting online shop customers in Germany, Belgium, and the Netherlands. Payment data was not exposed. Lidl contacted customers of its online shop in Germany, Belgium, and the Netherlands last week to inform them that their personal data had been stolen in an attack on an external IT service provider. […]

Dutch police suspect local hackers behind the Odido breach that exposed 6M customers after a phishing attack and seek public help identifying them. Dutch police have identified strong indications that Dutch nationals were involved in the February 2026 cyberattack on telecom provider Odido, which resulted in data from more than six million customers being stolen […]

AssuranceAmerica confirmed a breach exposing nearly 7 million driver’s licenses after hackers compromised an employee account and stole customer data. U.S. auto insurer AssuranceAmerica has confirmed a data breach affecting nearly 7 million people, making it the largest known theft of Americans’ driver’s license information in 2026. “In a data breach notice sent to customers […]

Accenture confirmed a breach after a hacker claimed to steal 35 GB of source code, keys, and Azure credentials now offered for sale. A threat actor using the handle “888” claimed on the cybercrime forum PwnForums this week to have stolen 35 gigabytes of data from Accenture in July and offered it for sale. “Today […]

Medtronic says a ShinyHunters attack exposed the personal and medical data of over 3.8 million people. Products and operations were unaffected. Medtronic is notifying 3,834,294 individuals after a cyberattack by the ShinyHunters extortion group exposed personal and medical information. In April 2026, Medtronic confirmed a cyberattack on its corporate IT systems after the hacker group ShinyHunters claimed […]

Hackers stole data from 4.38 million Aflac Japan customers after accessing its systems for 10 days before the breach was detected. Aflac Japan disclosed that hackers stole the personal information of 4.38 million customers and agents after gaining access to its systems between June 15 and June 25. Attackers stole data from the company policyholder […]

KDDI Corporation disclosed a breach affecting up to 14.2 million email accounts after attackers exploited a vulnerability in third-party software. KDDI Corporation disclosed a data breach that exposed up to 14.2 million email accounts across six Japanese internet service providers. KDDI Corporation is one of Japan’s largest telecommunications companies. It employs more than 60,000 people […]

Polymarket confirmed hackers stole funds from some users after attackers injected malicious code through a compromised third-party vendor. Polymarket confirmed that a security breach at a third-party vendor allowed attackers to inject malicious code into its website, leading to the theft of funds from an undisclosed number of users. The company said it has contained […]

24 Billion Records Left Open Online: Passwords, Emails, and Everything Else Exposed database with 24 Billion records revealed stolen credentials from infostealers, Telegram channels, and breach collections, risking account takeovers. Cybernews researchers found an exposed Elasticsearch cluster on June 12th containing 24 billion records and more than 8.3 terabytes of data. They triple-checked the numbers. […]

China’s UNC6508 hid in North American medical research networks for 2 years, stealing credentials and forwarding emails to Gmail Google’s Threat Intelligence Group published a report this week on UNC6508, a China-linked cyberespionage group that breached North American medical and military research organizations and stayed hidden for more than two years. The earliest confirmed intrusion […]

Novo Nordisk suffered a cyberattack where clinical trial data was copied. The breach is confirmed, but no threat actor has claimed responsibility. The Danish pharmaceutical giant Novo Nordisk disclosed a cybersecurity breach that resulted in unauthorized access to internal IT systems and the theft of personal data. The company sells some of the most in-demand […]

Pro-Iran group Handala breached Cal Water via an exposed GPS tool, reaching billing data for 2M customers. 5GB leaked. On June 11, 2026, the Iran-linked threat group Handala posted a claim on its blog that it had compromised California Water Service, known as Cal Water, and published a 5GB proof-of-concept data dump to back it […]

ShinyHunters exploited a critical Oracle PeopleSoft zero-day to breach over 100 organizations, mostly universities, before a patch was available. Mandiant and Google’s Threat Intelligence Group published an analysis of an active ShinyHunters campaign on June 11, one day after Oracle finally issued an advisory for the vulnerability being exploited. The gap matters: the activity ran […]

Security Affairs 1 month, 1 week ago

France’s Government Messaging App Tchap Got Breached

France’s government chat app Tchap was breached after a single account was compromised, exposing messages and data from public channels. Tchap, the encrypted messaging platform developed by the French government for its civil servants and made mandatory last year, was breached on June 7. ANSSI, France’s cybersecurity agency, detected the intrusion. The vector was straightforward: […]

ShinyHunters leaked 234 GB of data allegedly stolen from DentaQuest after failed negotiations, potentially impacting 2.6 million people. The ShinyHunters extortion group has published a 234 GB archive of data allegedly stolen from dental benefits administrator DentaQuest. The cybercrime gang added the company to its Tor data leak site in May, and the data was […]

Carnival disclosed a data breach affecting nearly 6 million people after hackers used social engineering to access employee accounts. Carnival Corporation is notifying nearly 6 million people after a data breach exposed personal information. According to the notification shared with the Maine Attorney General’s Office, the total number of persons affected is 5,995,277. The company said […]

The Oncology Institute disclosed a data breach tied to a third-party vendor, potentially exposing patient information after a 2025 cyberattack. The Oncology Institute has confirmed that patient information was impacted in a cybersecurity incident involving a third-party software provider. The healthcare network first disclosed the security breach in November 2025 while the vendor’s investigation was […]

A hacker is selling a 340M-strong OnlyFans-linked dataset built by correlating old breaches and public data, not by hacking OnlyFans directly. A threat actor is adverertising a purported database containing data of 340 million OnlyFans users, but the available evidence points to something less dramatic than a direct breach. According to HackRead, which reported the […]