Attackers Use LLM Agent for Post-Exploitation After Marimo CVE-2026-39987 Exploit
An unknown threat actor has been observed using a large language model (LLM) agent to conduct post-compromise actions after obtaining initial access following the exploitation of a publicly-accessible Marimo network using a recently disclosed vulnerability. “The...
New Russian-Linked GREYVIBE Targets Ukraine with AI-Powered Cyberattacks
A previously undocumented threat actor dubbed GREYVIBE has been attributed to ongoing and persistent attacks targeting Ukraine and Ukraine-related entities since at least August 2025. GREYVIBE, per WithSecure, is assessed to be a Russian-speaking group operating...
What 2,000 Exposed Vibe-Coded Apps Reveal About the Limits of Most Security Stacks
Shadow AI used to mean employees pasting things they shouldn’t into ChatGPT. It now means something bigger: employees building full applications with AI, wiring them into production systems, and publishing them on the open internet. Without Security or IT in the...
Malicious Sicoob NuGet Steals Banking Credentials as npm Packages Target Cloud Secrets
Cybersecurity researchers have discovered a malicious NuGet package that masquerades as a C# software development kit for Sicoob, one of Brazil’s largest cooperative financial systems, to siphon client IDs and PFX certificates. According to Socket, versions...
Kimsuky Deploys HTTPSpy, Expands Arsenal with HelloDoor and VS Code Tunnels
The North Korean state-sponsored threat actor known as Kimsuky (aka Velvet Chollima) has been attributed to a fresh set of cyber attacks targeting South Korean military and corporate entities through March and April 2026. “Kimsuky employed a range of tailored...
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