Latest cybersecurity reporting from selected sources.

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 […]

Multiple WordPress plugins from ShapedPlugin were compromised in a supply chain attack after unknown threat actors managed to tamper with the official release channels and push backdoor code

Klue's Battlecards is now the third integrated application that has been compromised to steal customers' Salesforce data, and victims include Huntress, the cybersecurity vendor.

Multiple WordPress plugins from ShapedPlugin were compromised in a supply chain attack that distributed infected releases to paying customers via the vendor's official update system. [...]

Breach Is Among Several Recent Major Incidents Involving Billing Software ProvidersA publicly traded cancer treatment firm notified investors that a yet-undisclosed number of patients' information was compromised in a 2025 cybersecurity incident involving a third-party billing software vendor. The Oncology Institute provides cancer treatment care to nearly 2 million patients.

Incident Involved an Unnamed Third-Party VendorNew York City's municipal healthcare system is notifying nearly 2 million patients of a hacking incident discovered earlier this year involving a third-party vendor. The breach compromised a long list of information, including biometric data such as fingerprints.

Anthropic's Mythos Leak Points to Pattern of Failures, Sloppy Practices at AI LabsAnthropic accidentally exposed its most powerful unreleased AI model to compromise, and days later shipped its flagship coding tool's full source code without meaning to. Meta, Microsoft and OpenAI have each had comparable moments. Questions linger about the integrity of third-party AI tools.

Attackers operated an active C2 implant for up to a week and compromised AppSec vendor Xygeni's xygeni/xygeni-action in that time.

Crooks used simple phone scam to compromise vendor account, spilling personal and financial data belonging to more than 15,000 people A voice-phishing scam targeting one of Ericsson's service providers has exposed the personal data of more than 15,000 individuals after attackers sweet-talked an employee into handing over access.…

Compromise Affects Healthcare Clients of Co.'s Revenue Cycle Management ServicesBilling services vendor Trizetto Provider Solutions is notifying 3.4 million individuals of a hacking incident discovered in October 2025 that investigators have now determined started nearly a year earlier, when threat actors accessed the company's healthcare clients' insurance related data.

A new Android backdoor that's embedded deep into the device firmware can silently harvest data and remotely control its behavior, according to new findings from Kaspersky

eScan lawyers up after Morphisec claimed 'critical supply-chain compromise' A spat has erupted between antivirus vendor eScan and threat intelligence outfit Morphisec over who spotted an update server incident that disrupted some eScan customers earlier this month.…

Vendor Ships Emergency Fixes, Warning Flaw Facilitates Full System CompromiseAttackers are targeting a zero-day vulnerability in Cisco's Unified Communications and Webex products that facilitates remote code execution and root-level access to the underlying operating system, risking full system compromise. Cisco has released patches, warning that no workarounds exist.

Spanish flag carrier Iberia has begun notifying customers of a data security incident stemming from a compromise at one of its suppliers. The disclosure comes days after a threat actor claimed on hacker forums to have access to 77 GB of data allegedly stolen from the airline. [...]

SEC Filing Reveals Telecom Vendor Was Compromised for Nearly a YearA nation-state threat actor carried out a supply chain attack targeting Ribbon Communications, a leading U.S. provider of telecom and networking infrastructure, and may have maintained access within its systems for nearly a year. Ribbon said it became aware of the activity in early September.

Spanish fashion retailer MANGO is sending notices of a data breach to its customers, warning that its marketing vendor suffered a compromise exposing personal data. [...]

Outsourcing your helpdesk always seems like a good idea – until someone else's breach becomes your problem Discord has confirmed customers' data was stolen – but says the culprit wasn't its own servers, just a compromised support vendor.…

Crims raided third-party systems and lifted personal data, including license numbers and partial SSNs US insurance giant Farmers Insurance says more than a million customers had personal data nicked after a third-party vendor was compromised.…

Cierant Corp. Says Cleo MFT Zero-Day Exploit Compromised Health Plan Client DataA Connecticut-based firm that provides print and electronic document management services to health plans has reported to regulators that an exploit of a vulnerability in file transfer software from third-party vendor Cleo has resulted in a health data compromise affecting nearly 233,000 people.

345 Major HIPAA Breaches Reported to Feds So Far This Year, Affecting 29.9 MillionMidway through 2025, the federal website listing major health data breaches in the U.S. shows a familiar scene: Many hacking incidents including ransomware, dozens of third-party vendor incidents, and millions of individuals affected by compromised personal data.