QNAP urges users to update Plex Media Server to the latest version available in the QNAP App Center, as hackers are exploiting the Plex2Shell vulnerability chain. The vendor said it had received multiple reports of suspected compromises involving customers’ network-attached storage (NAS) devices. "QNAP has received reports from some users that Plex Media Server on their NAS appears to have been compromised through [Plex2Shell] vulnerabilities, and QNAP Technical Support is assisting the affected users,” the company says in an advisory today. Plex2Shell is a chain of four vulnerabilities in the Plex Media Server, tracked as CVE-2026-96652, CVE-2026-96654, CVE-2026-96655, and CVE-2026-96656. Security researcher Zach Main discovered and reported the flaws to Plex on July 27. Exploitation started shortly after the full technical details became public on October 16.
Some WordPress sites can still be attacked while they install the fix for an actively exploited flaw, according to Umut Bayram, the Picus Security researcher who found it. The update that installs the fix still unpacks its files using the site's old, unpatched code, so an attacker who strikes at the right moment can run code on the server. The researcher advises blocking web access to the
In April 2026, BleepingComputer reported that Canadian authorities arrested three men for operating an “SMS blaster,” a device that pretends to be a cell tower to send phishing texts to nearby phones. It’s a close cousin of the IMSI catcher, the fake-tower device used for surveillance. Both work by tricking phones into connecting to the strongest signal and sharing information before anything is authenticated. One of the main things a fake tower can collect this way is your IMSI, the identifier tied to your SIM, but it’s far from the only thing your phone gives away. Your phone has several radios that connect to different kinds of signals and share different information. The Wi-Fi and Bluetooth radios share hardware addresses, which modern phones randomize or rotate to reduce tracking.
D-Link shared mitigation measures for multiple unpatched security flaws affecting DGS-3130 series managed Gigabit stackable switches. These switch models provide multi-gigabit uplinks, allowing enterprise network administrators to eliminate data bottlenecks, and are designed primarily for small-to-medium businesses (SMBs) and metro Ethernet deployments. While D-Link didn't share details on these flaws and has yet to publicly disclose the CVE IDs for easier tracking, it said Spectrum Community Solutions network engineer Giresh Kumar Enugu found the bugs in the D-Link Discovery Protocol (DDP) authentication, access control, and information handling. Successful exploitation could allow attackers to obtain sensitive device data, make unauthorized credential/configuration changes, leak SNMP communities, or cause service disruptions and device resets.
OpenAI GPT-6 Cyber found 81 high-severity Firefox flaws and hundreds of Linux bugs, raising new questions about AI-powered cyber risks. OpenAI has introduced GPT-6 Cyber, a model built for security research that it says finds and fixes vulnerabilities better and stays within the limits researchers set far more reliably. These are OpenAI’s own results and evaluations, so read them as claims to check. “We’re introducing GPT‑6 Cyber, a major leap in security research: more capable at finding and fixing vulnerabilities, and far more reliable staying within the boundaries researchers set. GPT‑6 Cyber delivers major gains on key cybersecurity benchmarks over GPT‑5.6 Cyber, including a 51% relative improvement on ExploitGym and a step function improvement when tested on staying within scope.” reads the announcement. “It is already helping to secure real-world software, uncovering and validating thousands of exploits in security-critical codebases such as Linux and Firefox.” GPT-6 Cyber outperformed previous models in tests measuring its ability to exploit vulnerabilities. It scored 48.5%, compared with 32.1% for GPT-5.6 Cyber, and outperformed GPT-6 Astra in most cybersecurity tasks. It also found more flaws during web penetration tests, identifying 40.3% of vulnerabilities versus 32% for Astra. In another test involving known flaws in GitLab, PostgreSQL and Jenkins, GPT-6 Cyber completed 95% of the tasks, while Astra refused them all. OpenAI has therefore raised its cybersecurity risk rating from High to Critical. The real-world numbers are bigger. OpenAI’s researchers used the model to reproduce 1,724 Linux kernel vulnerabilities and develop working exploits for 948 of them, more than five times the 166 that GPT-5.6 Sol managed with the same research setup. Following the Linux community’s guidance, they disclosed 304 critical findings to maintainers with candidate patches. “Developing exploits for 948 Linux kernel vulnerabilities. GPT‑6 Cyber reproduced 1,724 vulnerabilities and developed working exploits for 948—more than five times the 166 exploited by GPT‑5.6 Sol using the same research harness. Following the Linux community’s guidance, we disclosed 304 critical findings to maintainers with candidate patches and are in the process of getting other vulnerabilities fixed.” continues the announcement. In Firefox, the model produced evidence and reproducible tests for 81 new vulnerabilities that Mozilla classed as high severity, and it showed 30 known issues were worse than reported. Mozilla began landing fixes soon after getting the reports. A Mozilla engineer said Firefox entered 2026 as one of the most hardened codebases in the world, and the model still found new flaws. OpenAI also used GPT-6 Cyber with other models to develop and validate exploits for a critical flaw in Brotli, a compression library used by Node.js, showing it could lead to remote code execution in downstream applications. Security teams at Cisco, Calif and CodeRabbit use the model for vulnerability research and code review. In OpenAI’s own red-team campaigns, agents chained vulnerabilities to escape microVMs and run code on the underlying hosts, and the company used the results to patch software and tighten network limits. Power like that makes scope control the key question. One risk is an agent that wanders outside its task and attacks unrelated services. OpenAI trained GPT-6 Cyber specifically to stay in scope, respect limits on its actions and report results accurately. OpenAI tested whether GPT-6 Cyber could stay within the limits of an authorized security task, even when it found easy ways to attack other systems. The model avoided unauthorized actions in 99.93% of cases, compared with 94.49% for GPT-5.6 Cyber. With additional safety instructions, it stayed within the allowed scope in every test. “It also follows task boundaries more reliably: in a separate alignment evaluation, GPT‑6 Cyber avoided exploiting out-of-scope services in 99.93% of tests without its deployment prompt, and 100% with this prompt.” states the AI company. “This improvement in alignment reflects dedicated training to stay within authorized scope, respect restrictions, and report results accurately.” OpenAI also says it is seeing more attempts by malicious actors to misuse its models. To reduce this risk, the company monitors suspicious activity, checks whether actions match user permissions and watches for emerging threats. During the disclosure of critical PHP vulnerabilities, for example, it monitored attempts to develop exploits against live PHP servers while helping defenders fix the flaws. Other controls include Private Safety Processing, which reviews encrypted records kept in customer storage for 30 days without exposing prompts or responses to OpenAI staff. API customers on Zero Data Retention generally must use it. Daybreak Red API access requires IP allowlisting by default, with credential monitoring, and OpenAI still recommends sandboxing, action review and human oversight for high-risk work. Critical infrastructure gets special attention. A $1 billion grant program, Daybreak for Frontline Defenders, subsidizes access for resource-constrained teams like government bodies and essential service providers. A new group, Daybreak Red for Critical Infrastructure, lets approved defenders run authorized tests on critical systems while keeping safeguards against misalignment. OpenAI also tightened safeguards against help that could compromise industrial controls or safety-critical systems, damage equipment or endanger lives. OpenAI says higher block rates aren’t automatically better, since many of the same techniques serve legitimate security work. Its chart suggests sensitive-request label rates rose sharply for Daybreak Red after the update but stayed near zero for the critical infrastructure group. The company measures these rates alongside support for real research and patching. Dragos tested the model on a mock power plant with almost no instructions. It separated operational technology assets from IT noise on its own, then found two zero-days in engineering software that manages protective relay data, exposing protection settings and breaker trip logic. Dragos’s Rob T. Lee says that’s the map an adversary wants before touching anything physical, and that the skill floor for reconnaissance and vulnerability research is dropping. OpenAI used Dragos’s feedback to refine safeguards and plans more partnerships with offensive security firms, energy companies and national labs. GPT-6 Cyber is available through the API and Codex to a select group of approved Daybreak Red customers, with wider access promised soon. GPT-5.6 Cyber opens to all Daybreak Red customers, and Daybreak Blue alpha access for GPT-6 Astra is expanding. Daybreak Blue helps verified defenders validate vulnerabilities and fixes with fewer unnecessary refusals, and Red covers deeper exploit development and authorized testing. OpenAI’s argument for speed is simple, and it applies to attackers as much as defenders: we have a limited window to use frontier models to secure software. “Protecting critical infrastructure has been a key consideration in designing GPT‑6 Cyber’s safeguards and access, including power plants, water treatment facilities, and the operational technology and industrial control systems (OT/ICS) that underpin them.” concludes the announcement. Follow me on Twitter: @securityaffairs and Facebook and Mastodon Pierluigi Paganini (SecurityAffairs – hacking, OpenAI)
A browser extension that can run scripts on claude.ai could make Claude Desktop run code on a person's computer, researchers at Forever Security, an endpoint security company, showed in a test. The attack needs Dispatch, a Claude feature that lets people send tasks from their phone to Claude Desktop. The flaw that makes this possible can still be exploited, the researchers said earlier this
ENISA warns of cyberattacks on European refrigeration systems, exposing risks to supermarkets, food supplies and industrial controls. The European Union has issued a coordinated cybersecurity warning after a series of attacks hit commercial refrigeration systems in several Member States. The incidents, which began in October and continued with a new wave on November 1 and 2, have raised concerns about the security of equipment that plays an essential role in food distribution and other critical operations. In a joint statement published on November 4, ENISA, the European Commission, Europol and European cybersecurity coordination bodies urged organisations to take immediate steps to protect vulnerable systems. “Following a new wave of incidents having occurred on 1-2 November, ENISA, the European Commission (DG CNECT), Europol’s European Cybercrime Centre (EC3), the Network of the EU national computer security incident response teams (EU CSIRTs Network) and the European cyber crisis liaison organisation Network (EU- CyCLONe), advise organisations to take immediate action to mitigate exposure in the affected systems.” reads the advisory. The warning highlights the need for “immediate action to mitigate exposure”, as attackers continue to target systems that are often overlooked in traditional cybersecurity strategies. The attacks have already had tangible consequences. In France, hackers targeted refrigeration management systems used by hundreds of supermarkets, remotely changing their settings and forcing freezers into continuous defrost mode. Some systems reportedly reached temperatures of up to 50 degrees Celsius, destroying large quantities of fresh and frozen food. According to reports, around 300 Intermarché and Netto stores and fewer than 100 Coopérative U outlets were affected. Other retailers also reported disruptions to their cooling equipment. The French incidents also exposed a broader problem: the security of industrial control systems that manage physical processes. These systems are increasingly connected to corporate networks and remotely accessible, but they don’t always receive the same security attention as traditional IT infrastructure. BFMTV revealed the attackers targeted equipment from the Danish maker Danfoss that many French stores use to regulate their cold. Fresh and frozen stock was destroyed, and the Paris prosecutor says there were also fires. Targeted devices were older Danfoss refrigeration controllers that had reached the end of their support life and no longer received security updates. Other systems were running outdated firmware. Researchers had previously identified vulnerabilities in some Danfoss controllers, including weaknesses that could allow attackers to bypass authentication. However, authorities haven’t confirmed whether those specific flaws were exploited in the attacks. The European response reflects the fact that these incidents aren’t isolated technical problems. ENISA says national cybersecurity teams and EU crisis management authorities are sharing information and coordinating their investigations. The agencies also stress the importance of “rapid information-sharing” and a coordinated response to understand the scale of the campaign and help affected organisations. ENISA has also published a collection of technical advisories from national CSIRTs to help organisations identify the risks and apply appropriate protective measures. These recommendations are particularly relevant to companies operating refrigeration equipment, supermarkets, food distribution networks and other facilities that depend on industrial control systems. The statement also draws attention to existing European cybersecurity legislation. Since September 11, 2026, manufacturers of hardware and software products have been required to report severe incidents and actively exploited vulnerabilities through the Cyber Resilience Act’s Single Reporting Platform. The main cybersecurity requirements of the CRA will apply from December 11, 2027, requiring manufacturers to adopt security-by-design principles and provide security support throughout the product lifecycle, including timely vulnerability fixes. The NIS2 Directive also requires organisations within its scope to manage cybersecurity risks affecting their operations and report significant incidents to their national CSIRT or competent authority. ENISA is supporting these efforts through its Secure by Design and Default Playbook, technical advisories and initiatives aimed at improving product security across the European market. The refrigeration attacks are a reminder that cybersecurity failures can have consequences well beyond data theft or temporary IT outages. Manipulating an industrial controller can destroy food stocks, disrupt business operations and potentially affect services that people depend on every day. Organisations must therefore treat the security of operational technology as a core part of their risk management strategy, rather than an issue to address only after an incident. “The main cybersecurity requirements laid down in the Cyber Resilience Act (CRA) will apply as of 11 December 2027. Manufacturers of hardware and software products (‘products with digital elements’) will be required to implement security-by-design and ensure security support during the lifecycle of such products, including the remediation of vulnerabilities without delay.” concludes the Agency’s advisory. “In addition, entities to which the NIS2 Directive (Directive (EU) 2022/2555) applies must implement measures to manage the cybersecurity risks to their operations, and report significant incidents to their national CSIRT or authority. Furthermore, ENISA is actively contributing to strengthening cybersecurity across the EU by promoting secure-by-design and secure-by-default principles in the EU market.” Follow me on Twitter: @securityaffairs and Facebook and Mastodon Pierluigi Paganini (SecurityAffairs – hacking, refrigeration systems)
Cryptocurrency wallet provider MetaMask said a recent security incident has not affected MetaMask wallets or its wallet infrastructure. The MetaMask non-custodial crypto wallet (developed by blockchain software company Consensys) lets users store and manage assets on the Ethereum network and compatible blockchains. MetaMask revealed on September 30 that it was investigating an "ongoing infrastructure security incident" and exited affected validators (Ethereum network nodes responsible for proposing blocks, verifying crypto transactions, and maintaining Ethereum blockchain security) within non-custodial staking operations. While the company shared almost no details at the time and redirected BleepingComputer to the public statement when asked what part of its infrastructure was affected, in a Thursday update it said that a threat actor gained access to systems used to store recipient addresses and diverted some execution-layer staking rewards.
Hackers are using fake OpenAI, SpaceX, and Anthropic event invitations to lure employees into phishing attacks, using two different phishing-as-a-service platforms to steal Microsoft and Google account credentials and authentication sessions. According to a new report from Push Security, the attackers use convincing event registration pages offering free access to premium AI services and other rewards to trick victims into signing in with their corporate accounts. What makes the attacks interesting is that the same phishing pages integrate two separate phishing-as-a-service (PhaaS) platforms, Kali365 and VoidProxy, to target Microsoft and Google accounts using different authentication attacks. Kali365 conducts Microsoft device code phishing attacks, while VoidProxy acts as an adversary-in-the-middle (AiTM) reverse proxy to intercept Google sign-ins and steal authentication session cookies.
DigiCert warns it suffered a data breach after a server migration mistakenly exposed an internal business system to the internet, allowing unauthorized access to customer information and identity documents. The certificate authority says the breach affected a small portion of its archived customer data, including names, business email addresses, phone numbers, and business addresses. For some people, the exposed records also contained personal identification documents, such as driver's licenses, passports, and utility bills. DigiCert has begun sending data breach notifications to affected customers, with cloud architect Fabian Bader sharing a copy of the notification on X. "Thanks @digicert that your data leak was 'limited' to only my full PII data and potentially any verification documents I submitted for my certificate," Bader wrote.
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