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Major Cyber Attacks in May 2026: Fake Invitations, Agent Tesla, BlobPhish, and More

May 2026 showed how fast routine business activity can turn into real security exposure. ANY.RUN observed phishing campaigns, fileless malware delivery, credential theft, OTP interception, and remote access abuse targeting organizations across industries.  From fake invitations and banking portals to compromised B2B websites and Word Online lures, the month’s attacks had one thing in common: they were built…

CVE-2026-46300: Fragnesia Linux Kernel Flaw Grants Root via Page Cache Corruption

Local privilege-escalation bugs remain especially dangerous when they turn an ordinary user foothold into immediate root access. The CVE-2026-46300 vulnerability, nicknamed Fragnesia, is a high-severity Linux kernel flaw in the XFRM ESP-in-TCP subsystem that allows an unprivileged local attacker to write arbitrary bytes into the page cache of read-only files and escalate privileges. Public reporting…

Linux kernel maintainers suggest a ‘kill switch’ to protect systems until a zero-day vulnerability is patched

Linux server admins may get the ability to turn off a vulnerable function in the OS kernel until a patch for a zero-day vulnerability is ready, if a proposal from a kernel developer and maintainer is accepted by the open source community. The idea of a kill switch for privileged operators has been suggested by…

Flaw in Claude’s Chrome extension allowed ‘any’ other plugin to hijack victims’ AI

As businesses and governments turn to AI agents to access the internet and perform higher-level tasks, researchers continue to find serious flaws in large language models that can be exploited by bad actors. The latest discovery comes from browser security firm LayerX, involving a bug in the Chrome extension for Anthropic’s Claude AI model that…

Kamasers Analysis: A Multi-Vector DDoS Botnet Targeting Organizations Worldwide 

DDoS attacks are no longer only an infrastructure problem. They can quickly turn into a business issue, affecting uptime, customer experience, and operational stability. Kamasers is a strong example of this new reality, with broad attack capabilities and resilient command-and-control mechanisms that allow it to remain active under pressure. Let’s explore the Kamasers botnet through…

Kamasers Analysis: A Multi-Vector DDoS Botnet Targeting Organizations Worldwide 

DDoS attacks are no longer only an infrastructure problem. They can quickly turn into a business issue, affecting uptime, customer experience, and operational stability. Kamasers is a strong example of this new reality, with broad attack capabilities and resilient command-and-control mechanisms that allow it to remain active under pressure. Let’s explore the Kamasers botnet through…

Face off: Meta’s Glasses and America’s internet kill switch

Could America turn off Europe’s internet? That’s one of the questions that Graham and special guest James Ball will be exploring as they discuss tech sovereignty. Could Gmail, cloud services, and critical infrastructure really become geopolitical leverage? And is anyone actually building a Plan B? Plus we explore if Meta is quietly plotting to turn its…

Smashing Security podcast #455: Face off: Meta’s Glasses and America’s internet kill switch

Could America turn off Europe’s internet? That’s one of the questions that Graham and special guest James Ball will be exploring as they discuss tech sovereignty. Could Gmail, cloud services, and critical infrastructure really become geopolitical leverage? And is anyone actually building a Plan B? Plus we explore if Meta is quietly plotting to turn…