​Sam's Club, an American warehouse supermarket chain owned by U.S. retail giant Walmart, is investigating claims of a Clop ransomware breach. [...]

Artificial intelligence company OpenAI has announced a fivefold increase in the maximum bug bounty rewards for "exceptional and differentiated" critical security vulnerabilities from $20,000 to $100,000. [...]

A newly discovered phishing-as-a-service (PhaaS) operation that researchers call Morphing Meerkat, has been using the DNS over HTTPS (DoH) protocol to evade detection. [...]

Three security bypasses have been discovered in Ubuntu Linux's unprivileged user namespace restrictions, which could be enable a local attacker to exploit vulnerabilities in kernel components. [...]

A breach at Oracle Health impacts multiple US healthcare organizations and hospitals after a threat actor stole patient data from legacy servers. [...]

The legacy domain for Microsoft Stream was hijacked to show a fake Amazon site promoting a Thailand casino, causing all SharePoint sites with old embedded videos to display it as spam. [...]

Ten npm packages were suddenly updated with malicious code yesterday to steal environment variables and other sensitive data from developers' systems. [...]

A China-linked cyberespionage group known as 'FamousSparrow' was observed using a new modular version of its signature backdoor 'SparrowDoor' against a US-based trade organization. [...]

A new report sheds light on the most targeted WordPress plugin vulnerabilities hackers used in the first quarter of 2025 to compromise sites. [...]

Mozilla has released Firefox 136.0.4 to patch a critical security vulnerability that can let attackers escape the web browser's sandbox on Windows systems. [...]

Vivaldi has announced the integration of Proton VPN directly into its browser without requiring add-on downloads or plugin activations, allowing users to protect their data against 'Big Tech' surveillance for free. [...]

Dozens of vulnerabilities in products from three leading makers of solar inverters, Sungrow, Growatt, and SMA, could be exploited to control devices or execute code remotely on the vendor's cloud platform. [...]

The UK Information Commissioner's Office (ICO) has fined Advanced Computer Software Group Ltd £3.07 million over a 2022 ransomware attack that exposed the sensitive personal data of 79,404 people, including National Health Service (NHS) patients. [...]

Despite Oracle denying a breach of its Oracle Cloud federated SSO login servers and the theft of account data for 6 million people, BleepingComputer has confirmed with multiple companies that associated data samples shared by the threat actor are valid. [...]

Cloud-based streaming company StreamElements confirms it suffered a data breach at a third-party service provider after a threat actor leaked samples of stolen data on a hacking forum. [...]

A new cybercrime platform named 'Atlantis AIO' provides an automated credential stuffing service against 140 online platforms, including email services, e-commerce sites, banks, and VPNs. [...]

230M stolen passwords met complexity requirements—and were still compromised. Passwords aren't going away for now, but there are new technologies that may increasingly replace them. Learn more from Specops Software about how to protect your passwords. [...]

A threat actor named 'RedCurl,' known for stealthy corporate espionage operations since 2018, is now using a ransomware encryptor designed to target Hyper-V virtual machines. [...]

Two malicious packages were discovered on npm (Node package manager) that covertly patch legitimate, locally installed packages to inject a persistent reverse shell backdoor. [...]