threat-intel Windows 11 KB5089573 update released with performance improvements This article reports on the release of Windows 11 KB5089573, a non-security preview update for Windows 11 versions 25H2 and 24H2. The update focuses on performance improvements and reliability enhancements, including sha… BleepingComputer · May 27, 2026 Low windows 11performancereliability
malware AI Chatbot Recommendations Redirect Users to Cryptojacking Malware Sites Microsoft has identified a cryptojacking campaign utilizing AI chatbots to recommend malicious download sites, a novel approach to social engineering. The campaign impersonates legitimate system utilities like CrystalDis… The Hacker News · May 27, 2026 High CVE-2025-33073USaicryptojackingsocial engineering
vulnerability Microsoft Issues Out-of-Band SharePoint Patch Microsoft has released an out-of-band security patch to address a critical remote code execution vulnerability (CVE-2026-45659) in SharePoint Server. The flaw allows authenticated attackers to execute code without elevat… Dark Reading · May 26, 2026 Critical CVE-2026-45659CHremote code executionsharepointzero-day
phishing FBI warns of Kali365 phishing kit that breaks into Microsoft 365 accounts – no password required The FBI has issued a warning about Kali365, a phishing-as-a-service kit that allows attackers to compromise Microsoft 365 accounts without needing passwords, even when MFA is enabled. This kit leverages device code flow,… Graham Cluley · May 26, 2026 High USCAGBmfadevice-code-flowphishing
threat-intel Iranian APT Targets Aviation, Software Companies With Updated Tools The Iranian APT group, known as Nimbus Manticore, has been aggressively updating its tactics and tools to target aviation and software companies globally. The group, linked to Charming Kitten and the IRGC, is employing… SecurityWeek · May 26, 2026 High AEIRSAaptphishingappdomain
threat-intel MFA Prompt Bombing: Why Your Second Factor Isn't Saving You This article details a new attack technique called ‘MFA prompt bombing,’ where attackers repeatedly trigger multi-factor authentication prompts to trick users into approving access. The attack leverages push-based MFA sy… The Hacker News · May 26, 2026 High USmfapush-mfaprompt bombing
threat-intel ⚡ Weekly Recap: Linux Flaws, Defender 0-Days, Router Botnets, and Supply Chain Chaos This week’s security news highlights a significant GitHub breach orchestrated by TeamPCP, stemming from a compromised developer’s device and leveraging vulnerabilities exposed by the TanStack supply chain attack. Simulta… The Hacker News · May 25, 2026 High CVE-2026-46333CVE-2026-41091CVE-2026-45498USGBsupply-chainlinuxgithub
supply-chain TeamPCP Supply Chain Campaign: Activity Through 2026-05-24, (Mon, May 25th) TeamPCP, a threat actor, launched a sophisticated supply chain campaign involving the malicious publication of compromised code extensions and SDKs across multiple platforms, including GitHub, npm, and PyPI. This campaig… SANS Internet Storm Center · May 25, 2026 High CVE-2026-45321supply chaincredential theftdeveloper tools
supply-chain TeamPCP Supply Chain Campaign: Activity Through 2026-05-24, (Mon, May 25th) TeamPCP, a threat actor, launched a sophisticated supply chain campaign involving the trojanization of multiple software packages, impacting GitHub, Microsoft, OpenAI, Grafana Labs, and Mistral AI. The campaign utilized… SANS Internet Storm Center · May 25, 2026 High CVE-2026-45321supply chain attackcredential theftpublisher badge
phishing FBI warns of Kali365 phishing service targeting Microsoft 365 accounts The FBI has issued a warning about Kali365, a phishing-as-a-service (PhaaS) platform, being used to target Microsoft 365 accounts. This platform leverages device code authentication to bypass multi-factor authentication… BleepingComputer · May 25, 2026 High USphishingoauthmfa
threat-intel Claude Mythos AI Finds 10,000 High-Severity Flaws in Widely Used Software Anthropic’s Project Glasswing has identified over 10,000 high-severity vulnerabilities in widely used software, primarily through its Claude Mythos Preview AI model. This initiative focuses on proactively identifying and… The Hacker News · May 23, 2026 Critical CVE-2026-5194aivulnerabilitypatching
phishing FBI warns of Kali365 phishing-as-a-service after April Microsoft 365 attacks The FBI has issued a warning about Kali365, a Telegram-based phishing-as-a-service platform, following its use in April attacks targeting Microsoft 365 accounts. This service lowers the barrier to entry for cybercriminal… The Record · May 22, 2026 High USphishingoauthmfa
threat-intel Former US execs plead guilty to aiding tech support scammers Two former executives of C.A. Cloud Attribution, Ltd. have pleaded guilty to aiding a years-long tech support fraud scheme that targeted individuals worldwide. The executives knowingly provided services to telemarketing… BleepingComputer · May 22, 2026 High USGBTNtech support fraudtelemarketingfraud
threat-intel Paved With Intent: ROADtools and Nation-State Tactics in the Cloud This report details the use of ROADtools, an open-source toolkit primarily designed for red-teaming and research, by nation-state threat actors in cloud intrusions. The tool leverages legitimate Microsoft APIs to enumera… Palo Alto Unit 42 · May 22, 2026 High USentraidazureadtoken management
threat-intel China's Webworm Uses Discord, Microsoft Graphs to Hack EU Govts. A China-aligned Advanced Persistent Threat (APT) group known as Webworm has shifted its focus from Asia to targeting European governmental organizations, specifically in Belgium, Italy, Serbia, Spain, Poland, and South A… Dark Reading · May 22, 2026 High CHBEITaptdiscordmicrosoft graph
malware Cross-Platform NPM Stealer, (Fri, May 22nd) A cross-platform Node.js stealer has been discovered targeting Windows, macOS, and Linux systems. The malware, obfuscated to avoid detection, extracts sensitive data from various browsers and applications, including Chro… SANS Internet Storm Center · May 22, 2026 High USstealerobfuscatedbrowser
vulnerability Google accidentally exposed details of unfixed Chromium flaw Google inadvertently exposed details of a persistent vulnerability in Chromium, allowing for remote code execution on devices. The flaw, initially reported in December 2022, remained unfixed for over two years, leading t… BleepingComputer · May 21, 2026 High remote-code-executionbrowservulnerability
threat-intel ThreatsDay Bulletin: Linux Rootkits, Router 0-Day, AI Intrusions, Scam Kits and 25 New Stories This week's threat intelligence report highlights a diverse range of security incidents and vulnerabilities, including a significant Pwn2Own competition with substantial rewards, warnings about the risks of deploying age… The Hacker News · May 21, 2026 High CVE-2026-45793CVE-2026-8631UKUSCHzero-dayai securitysocial engineering
vulnerability Microsoft Warns of Two Actively Exploited Defender Vulnerabilities Microsoft has disclosed two actively exploited vulnerabilities within its Defender security platform, CVE-2026-41091 and CVE-2026-45498, both of which allow for privilege escalation and denial-of-service attacks. These v… The Hacker News · May 21, 2026 High CVE-2026-41091CVE-2026-45498CVE-2026-33825defendervulnerabilityprivilege escalation
vulnerability Microsoft Patches Exploited UnDefend and RedSun Defender Zero-Days Microsoft released patches for two previously exploited zero-day vulnerabilities within its Defender security software. These vulnerabilities, CVE-2026-41091 and CVE-2026-45498, allowed for privilege escalation and denia… SecurityWeek · May 21, 2026 High CVE-2026-41091CVE-2026-45498CVE-2008-4250zero-dayprivilege escalationdenial of service
