SoundCloud
December 15, 2025
•[ data leak, extortion ]
In December 2025, SoundCloud announced it had discovered unauthorised activity on its platform. The incident allowed an attacker to map publicly available SoundCloud profile data to email addresses for approximately 20% of its users. The impacted data included 30M unique email addresses, names, usernames, avatars, follower and following counts and, in some cases, the users country. The attackers later attempted to extort SoundCloud before publicly releasing the data the following month.
Lena Health
December 15, 2025
•[ data leak, healthcare, insecure server ]
AI digital helper Lena Health breach allegedly exposed sensitive Houston Methodist patient data on a dark web forum; access claimed via insecure server.
Pell City School System
December 15, 2025
•[ ransomware, security incident, data leak ]
Pell City School System reported that some of its technology systems were affected by a security incident. The superintendent told families that the student information system was not affected, but that a third party copied some files. The district said it was working to resolve the incident and restore services and stated it would not pay. A separate report stated that the SafePay ransomware group claimed responsibility in December 2025, but the school district had not publicly verified the claim or provided details about exactly what data was taken or how systems were accessed at the time of reporting.
Raaga
December 15, 2025
•[ data leak, unauthorized access, credential stuffing ]
Raaga confirmed that an unauthorized party accessed a legacy database and that the extracted user data was later advertised for sale on an underground hacking forum during December 2025. Reporting described the exposed dataset as affecting more than 10.2 million user accounts and including personal and account-related fields such as names, email addresses, usernames, hashed passwords, and account creation dates, with partial location data in some cases. The company stated it secured the relevant access points tied to the exposed system, reset passwords for impacted accounts, and implemented additional monitoring while working with cybersecurity specialists and notifying law enforcement. Even without payment data, the combination of emails and password hashes creates elevated risk of credential stuffing, targeted phishing, and account takeover.
Danish Booksellers' Commission Foundation
December 15, 2025
•[ ransomware, data leak, IT disruption ]
A Danish business foundation that distributes books to many bookstores reported being hit by ransomware during the busy Christmas period. The incident disrupted IT operations and prompted an investigation. The organization warned that attackers may have accessed internal files, including employee salary information and other personal data related to staff and potentially customers and former employees. Details on the initial access vector, the ransomware strain, and the total number of impacted individuals were not publicly provided.
Mazda Motor Corporation
December 15, 2025
•[ cyberattack, unauthorized access, data leak ]
SecurityWeek reported Mazda disclosed a mid-December cyberattack involving unauthorized access to a management system used for warehouse operations involving parts procured from Thailand. Mazda said 692 records tied to employees of Mazda and its group companies and business partners were compromised. Exposed data included company-issued user IDs, names, email addresses, company names, and business partner IDs. Mazda stated no customer data was affected because it is not stored in the compromised system and said attackers exploited security defects in the application, without naming the software or vulnerabilities.
Stockton Cardiology Medical Group
December 15, 2025
•[ unauthorized access, data leak, extortion ]
Stockton Cardiology Medical Group disclosed that an unauthorized individual accessed and removed files from its systems in December 2025, and some of the files were later publicly disclosed; outside reporting tied the incident to a Genesis extortion claim.
DXS International
December 14, 2025
•[ ransomware, data leak ]
DXS International disclosed a cyberattack affecting its office servers that it said was discovered on December 14, 2025 and immediately contained in cooperation with NHS England. The company reported minimal impact on services and said front-line clinical services were unaffected. The specific nature of the breach and whether patient medical information was stolen was not confirmed in the report; however, a ransomware group calling itself DevMan claimed credit and alleged theft of 300 GB of data. Regulators and law enforcement were notified and an external cybersecurity firm was engaged to investigate the scope and extent of unauthorized access.
Alpine Lumber
December 14, 2025
•[ ransomware, data leak, personally identifiable information ]
Alpine Lumbers posted notice states that on December 22, 2025 it determined certain network devices were encrypted with ransomware. The companys investigation found that between December 14 and December 22, 2025 an unauthorized actor viewed and obtained files stored on a file server. Alpine completed its file review and determined on February 5, 2026 that the affected files included employment-purpose information such as names, addresses, Social Security numbers, dates of birth, and health insurance plan enrollment information, and may also have included policy numbers, medical information, government IDs, financial account data, and payment card data. Alpine stated it notified law enforcement and began mailing letters and offering credit monitoring.
BarNet
December 12, 2025
•[ ransomware, data leak ]
Insurance Business reported that BarNet, a communications and infrastructure provider serving barristers and legal practices (including hosting, connectivity, file-sharing and a case-tracking platform), appeared on the SafePay ransomware groups leak site. The article states SafePay released material it claims was taken from BarNets systems, and that the leaked files reportedly include financial statements and legal/contract documents as well as sensitive personal records such as passport copies and CVs. The reporting focuses on the alleged data exposure and extortion context rather than confirmed encryption-related downtime, and it does not provide a confirmed initial access vector or a verified count of affected individuals.
Ahome City Hall
December 12, 2025
•[ data leak, ransomware, extortion ]
Article warns that Mexicos government cybersecurity is structurally weak. Experts cite basic misconfigurations, poor maintenance, limited staff training, and lack of an overarching cybersecurity law. Recent incidents, including municipal data leaks and ransomware affecting Guanajuatos attorney general, show risks of extortion, fraud, and weakened public trust.
Secretaría de Hacienda del Estado de Sonora
December 12, 2025
•[ data leak ]
Mexican media reported unauthorized access to servers of the Secretara de Hacienda del Estado de Sonora in December 2025, during which the criminal group Chronus exfiltrated and leaked approximately 40GB of documents and databases. State authorities suspended online services as a preventive security measure while investigating the intrusion.
National Credit Regulator (NCR)
December 12, 2025
•[ cyberattack, ransomware, data exfiltration ]
The South African National Credit Regulator confirmed it was the victim of a cyberattack in December 2025 that disrupted some of its systems. A ransomware group known as DragonForce claimed responsibility and alleged the exfiltration and publication of alleged 42 GB of data, but the regulator stated investigations were ongoing and has not confirmed data exfiltration, encryption, or the attackers identity.
Ahome City Hall
December 12, 2025
•[ ransomware, data leak, extortion ]
Article warns that Mexicos government cybersecurity is structurally weak. Experts cite basic misconfigurations, poor maintenance, limited staff training, and lack of an overarching cybersecurity law. Recent incidents, including municipal data leaks and ransomware affecting Guanajuatos attorney general, show risks of extortion, fraud, and weakened public trust.
SecretarÃÂa de Hacienda del Estado de Sonora
December 12, 2025
•[ data leak, unauthorized access, exfiltration ]
Mexican media reported unauthorized access to servers of the Secretara de Hacienda del Estado de Sonora in December 2025, during which the criminal group Chronus exfiltrated and leaked approximately 40GB of documents and databases. State authorities suspended online services as a preventive security measure while investigating the intrusion.
Erie Family Health Centers
December 10, 2025
•[ unauthorized access, data leak, medical records ]
Erie Family Health Centers detected unauthorized access in January 2026 and later determined that an unauthorized third party accessed its network between December 10, 2025 and January 27, 2026, exposing personal, financial, credential, medical, and health insurance information for approximately 570,000 individuals.
Eanes ISD
December 6, 2025
•[ ransomware, data leak, network outage ]
Eanes ISD experienced a weeklong Wi-Fi outage beginning December 6, 2025 that made tools including Skyward and Google Classroom unavailable and forced paper-based workarounds; later, Qilin claimed the district on a leak site, but no public theft details were confirmed.
Greater St. Louis Oral & Maxillofacial Surgery PC
December 4, 2025
•[ phishing, data leak ]
Unauthorized access to a server-hosted employee email account resulted in exposure of patient personal and protected health information and use of the account to send phishing emails.
Goodwin University
December 4, 2025
•[ network disruption, unauthorized access, data breach ]
Goodwin University experienced a network disruption on December 4, 2025 and secured its network environment. Qilin claimed responsibility on December 28, 2025, and the investigation later determined that certain files may have been acquired without authorization. DataBreach indexed 209,218 rows tied to the breach, while outside reporting says Goodwin later confirmed 56,156 impacted individuals. Public sources did not confirm encryption or the precise disruption mechanism.
Yokosuka Gakuin School Corporation
December 1, 2025
•[ ransomware, data leak ]
Yokosuka Gakuin School Corporation disclosed a ransomware-related cyberattack discovered in early December 2025 involving unauthorized access to a server and external leakage of photos and videos. The school disconnected systems as a precaution and stated that investigations were ongoing; no quantitative details about data volume or affected individuals were publicly released.