Beckett Collectibles
November 9, 2025
•[ data leak, website defacement ]
In November 2025, Beckett Collectibles experienced a data breach accompanied by website content defacement. The stolen data was later advertised for sale on a prominent hacking forum, with portions subsequently released publicly. The publicly circulating data initially included more than 500k email addresses reportedly belonging to North American customers, before a larger corpus of over 1M addresses was published the following month. The impacted data included names, usernames, phone numbers and physical addresses.
Logitech
November 8, 2025
•[ ransomware, data leak ]
Swiss outlet watson.ch, citing Tribune de Genve and 24 Heures, reports that Swiss peripherals maker Logitech was listed on the Clop ransomware gangs dark web leak site, with extortionists claiming to have stolen data and threatening to publish it unless a ransom was paid; subsequent regulatory filings and security reporting confirm t
Protei
November 8, 2025
•[ data leak, hack, website defacement ]
Surveillance-technology and telecom systems provider Protei, founded in Russia and now headquartered in Jordan, was hacked by an unidentified actor who defaced its public website around November 8, 2025 and stole the contents of its web server, including about 182 GB of historical emails and files related to its deep packet inspection and lawful intercept products used by telecoms across dozens of countries.
Salesforce customers via Gainsight-published applications
November 8, 2025
•[ data leak, supply chain attack, API abuse ]
A large-scale supply-chain campaign abused OAuth tokens linked to Gainsight-published applications integrated with Salesforce, enabling unauthorized API calls that accessed certain customers Salesforce data; according to Salesforce and multiple security advisories, suspicious activity began around November 8, 2025, and may have affected more than 200 Salesforce instances before tokens were revoked and the apps were pulled from the AppExchange.
Georgia Superior Court Clerks’ Cooperative Authority
November 8, 2025
•[ ransomware, data leak ]
The Devman ransomware group attacked the Georgia Superior Court Clerks Cooperative Authority beginning November 8, 2025. GSCCCA voluntarily restricted access to its systems while investigating a credible cyber threat. Devman claimed to have exfiltrated 500 GB of organizational data from GSCCCAs application servers and demanded a $400,000 ransom by November 27.
Catalyst RCM
November 8, 2025
•[ unauthorized access, credential misuse, data leak ]
Catalyst RCM disclosed that an unauthorized actor used valid credentials to access a secure file management server between November 8 and 9, 2025, and copied data without permission, affecting client data including records tied to Vikor Scientific.
U.S. Congressional Budget Office
November 6, 2025
•[ data leak ]
The U.S. Congressional Budget Office confirmed a cybersecurity incident after a suspected foreign hacker breached its network, potentially exposing sensitive internal information. A CBO spokesperson told BleepingComputer that the agency identified the intrusion, immediately contained it, and deployed additional monitoring and new security controls while the investigation continues. Reporting based on U.S. officials indicates that emails and exchanges between congressional offices and CBO analysts may have been accessed, raising concerns that draft reports, economic forecasts, and other confidential communications could be at risk, although the extent of any data exfiltration has not yet been established and CBOs work for Congress is continuing.
Checkout.com
November 6, 2025
•[ extortion, unauthorized access, data leak ]
Checkout.com reported that an extortion actor accessed a legacy cloud file storage system and claimed to have obtained data; the company confirmed unauthorized access but no operational disruption or verified data theft.
Mower County
November 6, 2025
•[ ransomware, data leak, government ]
Mower County reported that it detected a ransomware attack on June 18, 2025 and investigated with cybersecurity and data forensics consultants. The county said unauthorized access to its systems occurred sometime between June 11 and June 18, 2025 and that sensitive personal data collected by the county was stolen. Reported affected data types include Social Security numbers, birthdates, names, ID card numbers, fingerprints, financial account information, medical/health insurance information, and payment card information. As of Dec. 3, 2025, the county said it had no indication the stolen information had been released or offered for sale; it also noted approximately 27,064 notification letters were being sent.
Zilvia.net
November 6, 2025
•[ data leak ]
In November 2025, data breached from the Zilvia.net Nissan 240SX Silvia and Z Fairlady car forum was leaked. The breach exposed 288k unique email addresses along with usernames, IP addresses and salted MD5 password hashes sourced from the vBulletin based platform. Attempts to contact Zilvia.net about the incident were unsuccessful.
Kansas City Police Department
November 5, 2025
•[ data leak, hack, law enforcement ]
Reporting by KCUR, WIRED, and DataBreaches.net describes a major hack of the Kansas City, Kansas Police Department whose internal records were exfiltrated in 2024 and later published by transparency collective Distributed Denial of Secrets. The leaked cache, reportedly more than one terabyte in size, includes a secret Veracity Disclosure or Giglio List that identifies officers whose documented misconduct could undermine their testimony, along with supporting case files and internal correspondence. Police officials confirmed that the department experienced a cyber incident reported to federal agencies but criticized publication of the names as relying on stolen, unverified data and potentially harming officers reputations.
Oscars Group
November 5, 2025
•[ ransomware, data leak ]
Insurance Business reports that Australian hospitality conglomerate Oscars Group was listed on the Medusa ransomware gang's leak site on November 5, 2025, with the criminals claiming to have exfiltrated more than one hundred and thirty thousand internal files and threatening to publish them unless a ransom of one hundred thousand US dollars is paid or daily fees are provided to delay release; samples posted as proof reportedly include invoices, staff rosters, event schedules, daily financial records and identity documents such as passports and driver licences, much of it tied to the recently acquired Lakes Resort Hotel in South Australia, indicating a significant data breach even though no operational outages have been publicly disclosed.
Microbix Biosystems Inc.
November 5, 2025
•[ ransomware, data leak ]
Microbix Biosystems disclosed that an international ransomware group infiltrated and corrupted one of its corporate servers, deploying ransomware that temporarily took file storage systems offline but did not disrupt manufacturing, safety or communications. The company successfully recovered the server and data from backups yet later learned that at least some data had been copied externally, including commercially sensitive information and employee data
Habib Bank AG Zurich
November 5, 2025
•[ ransomware, data leak ]
Qilin ransomware group listed Habib Bank AG Zurich on its leak site on November 5, 2025, claiming theft of more than 2.5 TB of data and nearly 2 million files. Cybernews verified screenshots showing stolen passport numbers, account balances, transaction notifications, and internal tool source code.
Nikkei
November 4, 2025
•[ malware, data leak ]
Japanese media conglomerate Nikkei disclosed on 4 November 2025 that attackers had compromised its Slack messaging environment after malware on an employee's computer stole authentication credentials, which were then used to access multiple Slack accounts. The breach, discovered in September, exposed data for 17,368 employees and business partners, including their names, email addresses and chat histories. Nikkei forced password resets, reported the incident to Japan's Personal Information Protection Commission despite believing the stolen data falls outside formal reporting rules, and said no information related to confidential journalistic sources or reporting activities has been confirmed leaked.
Tisza Party App
November 4, 2025
•[ data leak, malware ]
Ahead of Hungarys 2026 parliamentary elections, opposition leader Pter Magyar said a malware-based cyberattack against his TISZA partys mobile application led to the illegal leak of his supporters personal data. Pro-government media reported that a database of roughly 200,000 names from the app, containing users names, email and postal addresses and phone numbers, was briefly published online before being taken down. Magyar alleges that international cyber pirates backed by Russian services have been attacking his systems for months to intimidate supporters and hinder planned primary elections on the app, prompting the party to move the vote to a different website.
RUAG LLC
November 4, 2025
•[ ransomware, data leak ]
Ransomware group Akira launched a double-extortion style attack against RUAG LLC, the Virginia-based liaison office of Swiss defence contractor RUAG MRO Holding, encrypting local systems while threatening to publish roughly 24 GB of company data including employee details and confidential military information. RUAG reports the incident is isolated to RUAG LLC thanks to autonomous IT systems and says other RUAG networks in Switzerland remain unaffected. Authorities had previously warned Swiss organizations about Akiras surge in ransomware activity, and RUAG is considering filing a criminal complaint as forensic investigat
Doctor Alliance LLC
November 4, 2025
•[ ransomware, data leak, phi ]
Threat actor Kazu claimed theft of 353GB (?1.24M files) from Doctor Alliance LLC and demanded a $200,000 ransom; sample includes scanned patient PHI.
Millicom (TIGO)
November 3, 2025
•[ data leak ]
Millicom was contacted by ShinyHunters on November 3 following an intrusion in which threat actors exfiltrated hundreds of millions of customer-related records; negotiations failed after Millicom attempted to make installment payments, leading the group to list the stolen data for sale on November 13.
University of Pennsylvania
October 31, 2025
•[ data leak ]
Hacker alias WeGotHacked infiltrated University of Pennsylvania systems around Oct 31 2025, stealing an estimated 1.2 million donor records and compromising multiple @upenn.edu email accounts. On Nov 1 the actor used those accounts to send vulgar emails to the campus community. BleepingComputer later verified portions of the dataset. UPenn initially denied a breach but launched an investigation after the claims were substantiated.
