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Ciberataques26 may 2026

China's Webworm hits EU govs via Discord and Microsoft Graph

Chinese APT Webworm targets EU governments using Discord and Microsoft Graph API as covert command-and-control channels.

  • Restrict Discord and Microsoft Graph API access to only hosts that explicitly need it.
  • Enable Unified Audit Log in Azure and hunt for registered apps with suspicious Graph permissions.
  • Detect SoftEther VPN or SOCKS tunnel traffic originating from critical infrastructure hosts.
Gorka El Bochi Morillo
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CVE26 may 2026

CVE-2026-31635 DirtyDecrypt: public PoC for Linux kernel LPE

Public PoC released for CVE-2026-31635 (DirtyDecrypt), a Linux kernel local privilege escalation flaw discovered by Zellic and V12.

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Ciberataques26 may 2026

Linux rootkits, router 0-day, AI intrusions: 25 attacks

Attackers exploit trusted tokens, packages, and accounts across 25 incidents reported this week.

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IA26 may 2026

RAMPART & Clarity: security testing for AI agents

Microsoft open-sources RAMPART and Clarity, two frameworks for security-testing AI agents at development time.

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Bug Bounty26 may 2026

Repo jacking on bundler.io: open supply chain attack

Repo jacking on bundler.io let an attacker claim Bundler's orphaned GitHub repo and inject malicious code into any Ruby project referencing it.

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Ciberataques26 may 2026

Megalodon: 5,561 GitHub repos hit with malicious CI/CD workflows

5,718 malicious commits pushed to 5,561 GitHub repos in six hours to steal CI/CD pipeline secrets.

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Ciberataques26 may 2026

FBI shuts down First VPN used by dozens of ransomware gangs

FBI shut down First VPN, a criminal VPN service used by dozens of ransomware groups for network reconnaissance and corporate intrusions.

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Ciberataques26 may 2026

Infosecurity Europe 2026: what to watch

Infosecurity Europe 2026 brings together ransomware, offensive AI, and critical infrastructure defense as the dominant themes in London.

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Bug Bounty26 may 2026

Jacob Butler arrested for running Kimwolf botnet

Canadian Jacob Butler, 23, arrested for running the Kimwolf botnet; US seeks extradition on federal hacking charges.

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IA26 may 2026

Anthropic's restricted Mythos model may ship inside Claude Code

Anthropic is preparing to roll out Mythos to Claude Code, a restricted model flagged for major security risks to public and private software.

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CVE24 may 2026

CVE-2026-34926: Apex One zero-day actively exploited

CVE-2026-34926, a directory traversal zero-day in TrendAI Apex One on-premise, is being actively exploited in the wild; patch is available.

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Bug Bounty24 may 2026

KimWolf botnet admin charged: 2M devices, US-Canada joint op

US and Canadian authorities charged a Canadian national for running KimWolf, a DDoS botnet that infected nearly two million devices worldwide.

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