Security News

Chinese APTs Share Linux Backdoor in Central Asia Telco Attacks

"Showboat" doesn't show off, but clearly it doesn't need to, as it's long helped China spy on small market communications providers.

Selective HTTP Proxying in Linux, (Thu, May 21st)

Recently, Rob wrote about a tool, Proxifier, that can intercept requests from specific processes. Proxifier is available for Windows, macOS, and Android. But I have not seen a generic Linux option yet. The advantage of a tool like Proxifier is the ability to target specific software. For debugging, reverse engineering, and similar tasks, selecting a specific process is quite useful, as it creates less noise to sift through and simplifies analysis.

Content Delivery Exploit Opens Websites to Brand Hijacking

The Underminr domain-fronting attack allows threat actors to modify Web requests and leverage trusted websites to cloak malicious activity.

ThreatsDay Bulletin: Linux Rootkits, Router 0-Day, AI Intrusions, Scam Kits and 25 New Stories

This week starts small. A token leaks. A bad package slips in. A login trick works. An old tool shows up again. At first, it feels like the usual mess. Then you see the pattern: attackers are not always breaking in. They are using the parts we already trust. That is what makes it worrying. The danger is in normal things now - updates, apps, cloud buttons, support chats, trusted accounts. AI

Microsoft Warns of Two Actively Exploited Defender Vulnerabilities

Microsoft has disclosed that a privilege escalation and a denial-of-service flaw in Defender has come under active exploitation in the wild. The former, tracked as CVE-2026-41091, is rated 7.8 on the CVSS scoring system. Successful exploitation of the flaw could allow an attacker to gain SYSTEM privileges. "Improper link resolution before file access ('link following') in Microsoft Defender

When Identity is the Attack Path

Consider a cached access key on a single Windows machine. It got there the way most cached credentials do - a user logged in, and the key stored itself automatically. Standard AWS behavior. No one misconfigured anything or violated a policy. Yet that single key, which was easily accessible to a minor-league attacker, could have opened a path to some 98% of entities in the company's cloud

Shifting Budget Dynamics for Identity Security and AI Agents

AI agent projects are proliferating throughout the enterprise, and those AI agent identities require management, security, and governance. New Omdia research shows the AI agent identity budget dynamics are very different than traditional IAM projects.

9-Year-Old Linux Kernel Flaw Enables Root Command Execution on Major Distros

Cybersecurity researchers have disclosed details of a vulnerability in the Linux kernel that remained undetected for nine years. The vulnerability, tracked as CVE-2026-46333 (CVSS score: 5.5), is a case of improper privilege management that could permit an unprivileged local user to disclose sensitive files and execute arbitrary commands as root on default installations of several major

GitHub Internal Repositories Breached via Malicious Nx Console VS Code Extension

GitHub on Wednesday officially confirmed that the breach of its internal repositories was the result of a compromise of an employee device involving a poisoned version of the Nx Console Microsoft Visual Studio Code (VS Code) extension.  The development comes as the Nx team revealed that the extension, nrwl.angular-console, was breached after one of its developers' systems was hacked in the

Highly Critical Drupal Core Flaw Exposes PostgreSQL Sites to RCE Attacks

Drupal has released security updates for a "highly critical" security vulnerability in Drupal Core that could be exploited by attackers to achieve remote code execution, privilege escalation, or information disclosure. The vulnerability, now tracked as CVE-2026-9082, carries a CVSS score of 6.5 out of 10.0, per CVE.org. Drupal said the vulnerability resides in a database abstraction API that is

ISC Stormcast For Thursday, May 21st, 2026 https://isc.sans.edu/podcastdetail/9940, (Thu, May 21st)

Cyber Pros Can't Decide If AI Is a Good or a Bad Thing

There is nothing cybersecurity professionals are more excited about, and nothing they fear more, than AI.

GitHub Confirms Breach, 4K Internal Repos Stolen

Open source software giant GitHub confirmed a data breach this week involving the theft of thousands of repos. One threat actor — TeamPCP — took credit.

Fake Android Apps Commit Carrier Billing Fraud for Premium Svcs.

The disguised apps use WebView automation, JavaScript injection, and OTP interception to avoid detection and complete fraudulent subscriptions.

Processes and Culture Top Reasons Behind Data Breaches

Government leaders revealed that, in spite of state laws meant to improve cyber hygiene, an analysis of incidents showed issues persist and visibility falls short.

Microsoft Open-Sources RAMPART and Clarity to Secure AI Agents During Development

Microsoft has unveiled two new open-source tools called RAMPART and Clarity to assist developers in better testing the security of artificial intelligence (AI) agents. RAMPART, short for Risk Assessment and Measurement Platform for Agentic Red Teaming, functions as a Pytest-native safety and security testing framework for writing and running safety and security tests for AI agents, covering

Patch Now: Critical Flaw in OT Robot OS Gives Attackers Control

An unauthenticated attacker can exploit the command injection vulnerability to gain remote access to robotic systems, causing significant disruption to the environment.

Microsoft Takes Down Malware-Signing Service Behind Ransomware Attacks

Microsoft on Tuesday said it disrupted a malware-signing-as-a-service (MSaaS) operation that weaponized the company's Artifact Signing system to deliver malicious code and conduct ransomware and other attacks, compromising thousands of machines and networks across the world. The tech giant attributed the activity to a threat actor it calls Fox Tempest, which it said offered the MSaaS scheme

Webworm Deploys EchoCreep and GraphWorm Backdoors Using Discord and MS Graph API

Cybersecurity researchers have flagged fresh activity from a China-aligned threat actor known as Webworm in 2025, deploying custom backdoors that employ Discord and Microsoft Graph API for command-and-control (C2 or C&C) communications. Webworm, first publicly documented by Broadcom-owned Symantec in September 2022, is assessed to be active since at least 2022, targeting government agencies

Agent AI is Coming. Are You Ready?

New Industry Data Just Released Suggests Not. On May 19th, 2026, Orchid Security released the results of our Identity Gap: Snapshot 2026. Among the findings, "identity dark matter" (the unseen, unmanaged elements of identity) now overshadows the visible elements 57% vs. 43%. And it couldn't have occurred at a worse time, with enterprises embracing Agent AI with both arms (and unfortunately, as