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Cybersecurity News Digest — Daily Briefings

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Google Warns of Rising LLMjacking Resource Hijacks

🛡️ Google warns that threat actors are increasingly hijacking enterprise access to Large Language Models (LLMs) to fraudulently consume costly compute and AI services. Attackers obtain API keys via phishing, leaked code, misconfigurations, or exposed tokens to run expensive workloads while victims incur the charges. Incidents span multiple regions and industries, with single-day fraudulent charges exceeding $100,000 and cumulative losses reaching millions in some cases.
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BTCPay Server flaw leads to hot wallet thefts

🛡️ BTCPay Server reported that attackers stole cryptocurrency from hot wallets on instances running version 2.4.1 or earlier, with about $1.63m traced to linked Bitcoin and Litecoin addresses. Blockchain analysis by Bitquery identified repeated sweeps between October 30 and November 2, and some activity continued after operators were warned to shut down. The project urged affected operators to rebuild servers with new wallets and seeds and noted that hardware wallets and wallets with spending keys held off-server were not impacted.
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Zero Wire: Cloudflare’s Vulnerability Intelligence Feed

📰 Zero Wire is a new public vulnerability intelligence feed on Cloudflare Radar designed to give security teams concise, actionable briefings on critical, internet-facing vulnerabilities. Each card summarizes the issue, affected deployments, recommended actions, and links to vendor advisories and evidence. Briefings include contextual network observations when available, a suggested agent prompt for impact assessment, and an update chronology to track developments. The service complements vendor advisories and vulnerability databases rather than cataloging every CVE.
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Google scales defenses to combat APAC scam networks

🛡️ Google outlines expanded measures to counter rising scam losses across the Asia Pacific region, which reached up to $114.1 billion USD in 2025. The company is deploying built-in protections such as Fake Call Detection and Pixel scam alerts, expanding Android developer verification, and promoting RCS-based defenses. Google is also engaging in industry coordination through the Industry Accord and new alliances like JASA, while Google.org commits $6 million to local partners for community training, AI prototyping, and policy support.
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PHP2Shell aftermath: patching, exploits, and impact

🔐 Late October’s emergency PHP patches for CVE-2026-109618 and CVE-2026-109619 aimed to stop remote code execution that could affect roughly 70% of websites. Despite fixes for multiple PHP branches, Censys found millions of vulnerable servers still unpatched two weeks later, while exploitation attempts and new exploits, including a related Brotli issue, continued to appear. Organizations must update PHP, audit systems, and watch for intrusion signs.
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Widespread Cyber Attacks Target Supermarket Refrigeration

🧊 Supermarkets in at least nine European countries reported a cyber-attack that manipulated refrigeration systems, spoiling chilled and frozen stock. Retailers in Belgium, Estonia, Finland, Ireland, Italy, Luxembourg, the Netherlands, Portugal and Sweden were affected, with temperatures reportedly set as high as 50°C. Authorities including Sweden’s NCSC and EU officials are investigating, while some UK food-supply businesses have also been impacted. The incidents mirror an October attack on refrigeration providers and raise concerns about deliberate disruption of food supply chains and potential nation-state involvement.
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Prompt Adware: Hidden AI Instructions Raise Enterprise Risk

🛡️ Check Point Research (CPR) uncovered ‘prompt adware’ in a Codex jailbreak bundle called Haiou that persistently modifies an AI agent’s trusted natural-language instructions to inject advertisements for a third-party AI gateway. The finding shows how prompts, Skills and configurations — not executable code — can quietly alter agent behavior, creating visibility and supply-chain challenges for organizations. CPR warns this persistence mechanism could be used for more harmful manipulations, including steering recommendations or exfiltrating sensitive data, and advises firms to monitor agent instructions, vet third-party components and strengthen governance.
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Network appliance patch delays widen exploitation window

🔒 Microsoft telemetry shows the median vulnerability on enterprise network appliances remains unpatched for over a year, even as the most dangerous flaws are weaponized within days of disclosure. The analysis of roughly 383,000 CVEs through September 2026 found patch times vary widely: about two weeks for Windows workstations, more than a month for Windows Server, over 10 weeks for Linux and macOS applications, and more than a year for network appliances. Researchers warn that rapid exploit development — accelerated by AI — has shortened the defender’s response time, urging continuous monitoring, emergency fixes, and prioritization by exposure rather than CVSS alone.
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NCSC Warns of AI-Driven Ransomware Risk to CNI

🔒 The NCSC warns AI-powered malware is highly likely to be used in ransomware attacks on the UK’s critical national infrastructure by 2028, potentially affecting power stations, airports and hospitals. CEO Richard Horne urged organisations to address long-tolerated vulnerabilities and underinvestment in security, while the government announced major funding for national cyber programmes, AI security initiatives and SME support.
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Critical Linux TCP use-after-free patched by vendors

🔒 Red Hat has released fixed kernels for RHEL 8, 9, and 10 addressing a remote, unauthenticated IPv4 TCP use-after-free (CVE-2026-98432) that can lead to remote code execution; a reboot is required after update. Canonical has provided patches for Ubuntu 22.04, 24.04, and 26.04 in the -proposed testing pocket but has not set a regular release date. Red Hat and others published mitigations and guidance while upstream and other vendors already shipped fixes in October.
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Gorbag group uses simple stealers against Ukraine

🛡️ ESET attributes a Russia-aligned actor called Gorbag to targeted campaigns against Ukrainian organizations since at least February 2025, favoring law enforcement, justice, local administrations near front lines, and defense. The group deploys lightweight information stealers such as GIFTEDCROOK and BeautyStealer to exfiltrate browser data, VPN configs, credentials, and documents, often via spear-phishing lures and malicious attachments. Observed tooling also includes Prime ReverseShell and DLL sideloading chains exploiting a patched WinRAR flaw (CVE-2025-8088), with stolen archives sent to Telegram or custom C2 servers.
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AI-driven attacks expose endpoint blind spots

🛡️ CrowdStrike and Microsoft reported that China-linked groups used an AI-powered penetration framework called ARTEX to probe and exploit security gaps across hundreds of organizations in October. The campaigns targeted governments and businesses, using multiple AI agents to automate reconnaissance and post-exploitation checks—sometimes identifying missing endpoint sensors and misconfigured cloud roles. Researchers warn that AI lowers the cost and time of attacks and urge improved visibility, credential hygiene, and continuous monitoring.
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Google warns of rising LLMJacking threat to enterprises

🛡️Google's Mandiant warns enterprises of a growing threat dubbed LLMJacking, where attackers bypass front-end chatbots to exploit backend large language model resources using exposed API keys and cloud tokens. Incidents this year span financial services, retail, technology and transportation, with fraudulent cloud charges exceeding $100,000 in a single day and up to $1m cumulatively before access was revoked. The ecosystem is maturing, with actors escalating privileges, abusing routing software, and establishing resale marketplaces that proxy and resell illicit LLM access.
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Security teams strained as AI and identity threats rise

🔍 AI, identity-based attacks, and expanding digital footprints are stretching cybersecurity teams thin, according to Barracuda’s Cybersecurity Skills Gap report. The survey of 2,000 IT and security decision-makers found that 67% say teams are struggling to scale to meet business needs while facing AI-related risks (68%) and advanced identity threats (67%). Organizations report reduced head count tied to AI and growing expectations to support digital operations without extra resources, prompting calls to combine AI with skilled human oversight.
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Synology NAS Ransomware Alerts Urge Immediate DSM Update

🔒 Synology is urging customers to update DiskStation Manager (DSM) after observing threat actors exploit a December 2024-patched vulnerability to deploy ransomware against devices running outdated DSM versions. The company referenced a November 2024 advisory listing three vulnerabilities (including CVE-2024-10441) and provided specific patched DSM version thresholds. Customers have reported infections attributed to C3RB3R ransomware that appends a ".L0CK3D" extension, and Synology recommends enabling automatic updates to reduce risk.
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Second wave of supermarket refrigeration cyberattacks

🧊 Multiple European supermarkets experienced remote tampering of refrigeration controls overnight into November 2, causing fridges and freezers to warm and forcing some retailers to remove or discard chilled and frozen goods. Vendors and suppliers including Danfoss were implicated, and impacted stores spanned Belgium, Sweden, Estonia and several other countries. Authorities and cybersecurity teams are investigating, and guidance from CERT-FR recommends isolating devices from the internet, updating firmware, and using secure VPNs or protected networks.
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Critical Siemens IoT2050 Flaw Under Active Exploitation

🛡️ A maximum-severity authentication bypass (CVE-2026-58115, CVSS 10.0) in Siemens SIMATIC IoT2050 Advanced devices' Node-RED HTTP interface is being actively exploited to deploy remote code execution. Siemens issued fixes in Industrial OS 4.3.4.1+ and recommends uninstalling or hardening Node-RED by enabling HTTPS and credential-based or OAuth/OpenID authentication, and protecting HTTP Nodes and the dashboard. VulnCheck observed attackers delivering multi-stage downloaders and persistent backdoors to run botnet binaries and arbitrary commands.
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Critical CVE-2026-81648 Targets CryptoPayment Plugin

🔒 Defused Cyber reports active exploitation attempts targeting CVE-2026-81648, a maximum-severity (CVSS 10.0) authorization bypass in the CryptoPayment Gateway WordPress plugin. The flaw affects versions 1.2.1–1.2.2 and allows unauthenticated attackers to invoke administrative AJAX operations, delete arbitrary files, overwrite gateway configuration, and recover wallet credentials. The plugin has been removed from the WordPress directory and no official patch is available; owners are urged to remove the plugin and rotate keys.
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