Last updated: September 29, 2026 at 8:42 AM UTC
All 891 Vulnerability 357 Breach 144 Threat 383 Defense 7
Tag: data-breach (47 articles)Clear

KDDI email breach affects up to 14.2 million accounts across six Japanese ISPs

Japanese telecom giant KDDI has disclosed a breach of an email platform it operates for itself and several internet service providers, potentially exposing the email addresses and passwords of up to 14.22 million mailboxes. KDDI detected the intrusion on June 17, blocked the attacker the same day, and traced the entry to a vulnerability in unnamed third-party software used by the email system. Six ISPs are affected, including JCOM, Nifty, and Biglobe, and the figure covers current, former, and inactive accounts. KDDI says some passwords were hashed or encrypted but has not said how many were stored in plaintext, and is urging all affected users to change their passwords.

Check
Customers of KDDI or the affected ISPs, including JCOM, Nifty, and Biglobe, should change their email passwords immediately and anywhere the same password was reused, and watch for phishing attempts.
Affected
Up to 14.22 million current, former, and inactive email accounts across six Japanese ISPs on KDDI's platform; exposed addresses and passwords enable account takeover, phishing, and credential stuffing where reused.
Fix
Affected users should change email passwords and any reused elsewhere, and enable multi-factor authentication. Organizations should inventory third-party software in shared platforms, patch promptly, and segment systems to limit breach scope.

ShinyHunters leaks Sysco data with 2.7 million email addresses after extortion

Food distribution giant Sysco was hit by the extortion group ShinyHunters in a "pay or leak" attack, and after the company did not pay, the stolen data was published. Have I Been Pwned has indexed 2,691,852 unique email addresses belonging to staff and customers, alongside what is described as largely corporate contact information. The breach fits ShinyHunters' sweeping 2026 campaign against large enterprises, which has typically relied on social engineering and compromised SaaS integrations rather than software exploits. Exposed business contact data is useful for convincing, targeted phishing aimed at Sysco's staff, customers, and partners.

Check
People and businesses dealing with Sysco should check Have I Been Pwned for affected emails and stay alert to phishing or invoice fraud that references Sysco accounts, orders, or deliveries.
Affected
Sysco staff, customers, and partners whose email addresses and corporate contact details were exposed (2,691,852 indexed); the data supports targeted phishing and business email compromise against the food-distribution supply chain.
Fix
Treat unexpected Sysco-themed emails with caution, verify payment or account changes through known contacts, enable phishing-resistant MFA, and brief staff and partners on the heightened phishing risk from this exposure.

American Tower breach surfaces on Have I Been Pwned with 216,000 accounts

Data from a breach of American Tower, one of the largest wireless communications infrastructure companies, has been indexed by Have I Been Pwned, which added 216,601 affected accounts. The extortion group ShinyHunters is linked to the incident, consistent with its sweeping 2026 campaign that has used social engineering against staff to reach corporate systems and exfiltrate data at major enterprises. American Tower operates critical telecom infrastructure, making any exposure of employee or partner data a concern for follow-on phishing and targeted attacks. Exposed contact details are commonly reused for convincing phishing against affected individuals and the organization.

Check
People connected to American Tower should check Have I Been Pwned for their email and stay alert to phishing referencing the company; the organization should review how the data was accessed.
Affected
Individuals whose data was exposed in the American Tower breach (216,601 accounts indexed); exposed contact information supports targeted phishing against a company operating critical communications infrastructure.
Fix
Reset and avoid reusing affected passwords, enable phishing-resistant MFA, and treat unexpected messages referencing American Tower with caution. Organizations should harden help desks and accounts against social-engineering-driven access.

ShinyHunters leaks Madison Square Garden Sports data on nearly 10 million people

The extortion group ShinyHunters has published data stolen from Madison Square Garden Sports, owner of the New York Knicks and Rangers, after the company did not pay. Have I Been Pwned indexed 9,796,738 unique email addresses spanning staff and customers, alongside extensive personal, employment, and customer-relationship records including names, addresses, phone numbers, and some dates of birth. Reporting on the leak describes an internal "Talent" file profiling former players, executives' family members, and celebrities, in some cases with so-called threat assessments. The intrusion reportedly began with voice-phishing of staff, the same social-engineering pattern behind ShinyHunters' wider 2026 campaign against large enterprises.

Check
People who interacted with Madison Square Garden venues or teams should check Have I Been Pwned for their email and watch for targeted phishing or fraud referencing tickets, accounts, or events.
Affected
Staff and customers of Madison Square Garden Sports whose contact and personal data was exposed (9,796,738 emails); high-profile individuals named in internal files face heightened targeting and impersonation risk.
Fix
Reset and avoid reusing affected account passwords, enable phishing-resistant MFA, and stay alert to convincing phishing. Organizations should harden help desks against voice-phishing with strict caller-identity verification.

Healthcare AI vendor Xsolis breach exposes data on 1.4 million people

Xsolis, a US healthcare technology company whose AI software is used by more than 600 hospitals and insurers for utilization management and reimbursement decisions, has disclosed a breach affecting 1,396,519 people. Attackers got in through a targeted phishing attack on an employee in January, accessing files containing patient data Xsolis handles for its clients. The exposed information includes names, dates of birth, addresses, Social Security numbers, health insurance details, and medical treatment information. Because Xsolis is a vendor, affected individuals may never have dealt with it directly; downstream health systems including Mayo Clinic are among those whose patients are impacted.

Check
Healthcare organizations should check whether they share data with Xsolis and confirm their breach-notification obligations; affected individuals should watch for medical, insurance, and identity fraud and any Xsolis-related notice.
Affected
Patients and health-plan members whose data Xsolis processed for hospitals and insurers (1,396,519 affected); exposed Social Security numbers and medical information carry lasting identity-theft and medical-fraud risk.
Fix
Affected people should enroll in the offered monitoring, freeze credit, and watch insurance statements. Healthcare organizations should strengthen phishing-resistant MFA, map which vendors hold patient data, and tighten access to health-data repositories.

Tata Electronics confirms breach as extortion gang leaks Apple and Tesla files

Tata Electronics, the Indian manufacturer that assembles roughly a third of Apple's iPhones in India, has confirmed a cyberattack affecting part of its IT systems after the extortion group World Leaks began leaking stolen data. The group claims to have taken around 200,000 files, including confidential Apple and Tesla manufacturing and component design documents, internal emails, years of event logs, and copies of employee passports, some belonging to foreign nationals. Researchers say the data has been on the dark web since at least June 10, and a ransom was demanded. World Leaks, a rebrand of the Hunters International group, also claimed breaches at Nike and Dell.

Check
Manufacturers and their partners should review how design documents, supplier data, and employee identity records are segmented and monitored, and watch for phishing or fraud using leaked passport and email data.
Affected
Tata Electronics, its employees whose passports and emails were exposed, and partners like Apple and Tesla whose confidential design and manufacturing documents were reportedly included in the roughly 200,000 leaked files.
Fix
Segment and tightly control access to sensitive design and HR data, monitor for large data exfiltration, enforce phishing-resistant MFA, and prepare partners for downstream phishing and fraud using the leaked information.

Texas Parks and Wildlife vendor breach exposes 3 million license holders

The Texas Parks and Wildlife Department says a breach at the third-party vendor that runs its hunting and fishing license sales exposed personal data for 3,087,721 customers, in what officials call the state's largest government data breach this year. The exposed information includes driver's license details, passport numbers where provided, email addresses, phone numbers, and home addresses; the department says Social Security numbers, dates of birth, and financial data were not taken. Texas Cyber Command detected the intrusion, which reached customer profile data through the vendor's systems. Because driver's license and passport numbers cannot be reset, affected people face lasting identity-theft and phishing risk.

Check
Texas hunting and fishing license holders should enroll in the offered Kroll credit monitoring before September 14, watch for phishing referencing licenses or state agencies, and review financial statements for fraud.
Affected
The 3,087,721 Texas hunting and fishing license customers whose driver's license, passport, and contact details were exposed through the department's third-party license vendor; minors were reportedly not affected.
Fix
Place a credit freeze or fraud alert with the major credit bureaus, enroll in the free monitoring, and stay alert to identity fraud. Organizations should tighten third-party vendor access controls and monitoring.

Ralph Lauren breach exposes customer data as ShinyHunters extends retail spree

Have I Been Pwned has added 139,903 accounts from a breach of fashion brand Ralph Lauren, which the extortion group ShinyHunters claimed as part of its sweeping 2026 campaign against retail and luxury names. ShinyHunters says it took around 220 GB of data, including customer personal information, purchase histories, and financial transaction details, along with unreleased product and strategy plans. The group typically breaks in not through a brand's core systems but via connected platforms like Salesforce or customer-service tools. Exposed purchase and contact data is prime material for convincing phishing and fraud aimed at the retailer's customers.

Check
Ralph Lauren customers should check Have I Been Pwned for their email, watch for phishing or fraudulent charges referencing orders or accounts, and review payment statements for unauthorized activity.
Affected
Ralph Lauren customers whose personal, purchase, and transaction data was exposed (139,903 accounts confirmed); the breach is part of a broader ShinyHunters wave hitting retail and luxury brands through connected platforms.
Fix
Reset and stop reusing any Ralph Lauren account passwords, enable MFA, stay alert to order- and refund-themed phishing, and consider monitoring payment cards used with the retailer for fraud.

JCPenney breach exposes Social Security numbers and tax records of 368,000

Have I Been Pwned has added 368,418 accounts from a breach of JCPenney, after the extortion group ShinyHunters claimed in mid-June it stole data from the retailer and several sister brands under Catalyst Brands and Authentic Brands Group. ShinyHunters says the haul includes highly sensitive employee and customer data: Social Security numbers, dates of birth, W-2 tax forms, payroll records, and scans of government-issued IDs. Unlike passwords, these identifiers cannot simply be reset, raising long-term identity-theft and tax-fraud risk. JCPenney has not confirmed the full scope, and the group has not published samples, but the data types make this a serious exposure.

Check
Current and former JCPenney and Catalyst Brands staff and customers should check Have I Been Pwned, watch for tax, payroll, and identity-themed phishing, and monitor for fraudulent tax filings or new-account activity.
Affected
JCPenney employees and customers, plus those tied to sister brands like Aeropostale, Brooks Brothers, Lucky Brand, and Nautica; exposed Social Security numbers, W-2s, and ID scans carry lasting fraud risk.
Fix
Consider a credit freeze and fraud alert, file taxes early to pre-empt fraudulent returns, reset any reused JCPenney passwords, enable MFA, and treat tax or payroll messages referencing the breach with caution.

Kodak confirms breach as ShinyHunters claims 2.2 million stolen records

Eastman Kodak has confirmed that an unauthorized third party gained temporary access to a limited amount of company data, after the extortion group ShinyHunters listed the firm on its dark-web leak site. ShinyHunters claims it stole more than 2.2 million records containing customer personal information and internal corporate data, and set a leak deadline of June 18, though it has released no proof and Kodak has not verified the figure. Kodak, now mainly a B2B manufacturing and technology company, says it engaged outside experts and law enforcement and sees no threat to operations. The breach fits ShinyHunters' prolific 2026 data-theft campaign.

Check
Kodak's business customers and partners should watch for targeted phishing and business email compromise referencing Kodak dealings, and verify any unexpected payment or account-change requests through known contacts.
Affected
Kodak customers and partners whose personal or corporate data may sit in the stolen records; ShinyHunters claims 2.2 million records, a figure Kodak has not confirmed and the group has not substantiated.
Fix
Watch for fraud and phishing tied to the breach, reset and stop reusing any Kodak-related credentials, and enable phishing-resistant MFA. Organizations should harden help-desk verification against social-engineering-driven data theft.