Stay informed on the latest data breach incidents and security breaches. Protect your information with our up-to-date breach news and analysis.
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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.
Weekly headline count for the current query.
Abbott Laboratories is investigating two separate cybersecurity incidents after confirming unauthorized access to internal legacy Exact Sciences systems in its Cancer Diagnostics business, while also investigating a separate claim that attackers breached its LabCentral portal and stole company data. [...]
Ernst & Young is notifying customers of a data breach caused by the compromise of a third-party support ticket system used by its IT personnel. [...]
Genetic testing company 23andMe has agreed to pay $18 million to settle claims from a coalition of 43 attorneys general that it failed to protect customers' genetic data. [...]
German discount supermarket chain Lidl notified customers in Germany, Belgium, and the Netherlands that attackers stole their personal information in a breach at a service provider. [...]
Learn how attackers abuse Entra ID through a free hands-on Capture the Flag. Varonis created the Breach at the Beach CTF to teach defenders how to investigate Entra ID attack techniques using realistic scenarios. [...]
The Dutch National Police (Politie) says it has found "strong indications" that Dutch hackers have been involved in a February breach at the telecommunications provider Odido. [...]
American insurance company AssuranceAmerica has disclosed a data breach impacting nearly 7 million drivers after attackers gained access to its systems earlier this year. [...]
Mount Royal University in Calgary says hackers stole and then deleted data from its file storage systems after breaching the university's network. [...]
Japanese telecommunications giant KDDI says that millions of people had their email addresses and passwords exposed after attackers breached an email platform used by five internet service providers (ISPs) in the country. [...]
IT services giant Accenture has confirmed it suffered a security breach after a threat actor claimed to have stolen 35 GB of source code and other data from the company. [...]
American insurance giant Aflac has disclosed a new data breach after attackers breached its Japan subsidiary's systems and stole personal and bank account information of 4.38 million customers. [...]
Nissan is warning that it suffered a data breach affecting current and former employees after threat actors exploited an Oracle PeopleSoft vulnerability in data theft attacks previously linked to the ShinyHunters extortion group. [...]
The National Association of Insurance Commissioners (NAIC) says the ShinyHunters extortion group stole only publicly available data, outdated logs, and configuration files after breaching its systems by exploiting a zero-day vulnerability in an Oracle PeopleSoft server. [...]
Japanese telecommunications operator KDDI Corporation disclosed a data breach where threat actors gained access to one of its email systems used by five other internet service providers (ISPs) in the country. [...]
Polymarket says it will fully reimburse customers who lost an estimated $3 million after hackers injected a malicious script into the platform's frontend following a breach at a third-party vendor. [...]
Market intelligence platform Klue suffered a OAuth breach that enabled the "Icarus" threat actors to steal Salesforce CRM data from multiple organizations in an ongoing extortion campaign. [...]
Kodak has confirmed that it's working with external cybersecurity experts to investigate a security breach after hackers gained access to some of the company's data. [...]
Opening a new social media account in the UK will soon mean proving you're over 16 with an ID upload or a facial age scan, under a government ban on under-16s taking effect in spring 2027. Security experts warn the age checks are easy to circumvent and create new data-breach risks. [...]
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 Council of Europe, the continent's oldest intergovernmental body, is probing claims of a data breach made by the ShinyHunters extortion group over the weekend. [...]