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, coveringView the full article
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 schemeView the full article
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 agenciesView the full article
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, asView the full article
AI-generated lookalike domains are now embedded inside the third-party scripts running on your web properties. Here's why your current stack can't see them, and what detection actually requires.
Download the CISO Expert Guide to Typosquatting in the AI Era →
TL;DR
Typosquatting is no longer a user problem. Attackers now embed lookalike domains inside legitimate third-party scripts.View the full article
Microsoft on Tuesday released a mitigation for a BitLocker bypass vulnerability named YellowKey following its public disclosure last week.
The zero-day flaw, now tracked as CVE-2026-45585, carries a CVSS score of 6.8. It has been described as a BitLocker security feature bypass.
"Microsoft is aware of a security feature bypass vulnerability in Windows publicly referred to as 'YellowKey,'" theView the full article
Grafana Labs, on May 19, 2026, said an investigation into its recent breach found no evidence of customer production systems or operations being compromised.
It said the scope of the incident is limited to the Grafana Labs GitHub environment, which includes public and private source code along with internal GitHub repositories.
"After the initial assessment, we found that in addition to sourceView the full article
GitHub on Tuesday said it's investigating unauthorized access to its internal repositories after the notorious threat actor known as TeamPCP listed the platform's source code and internal organizations for ***** on a cybercrime forum.
"While we currently have no evidence of impact to customer information stored outside of GitHub's internal repositories (such as our customers' enterprises,View the full article
Cybersecurity researchers have disclosed details of a new ad fraud and malvertising operation dubbed Trapdoor targeting Android device users.
The activity, per HUMAN's Satori Threat Intelligence and Research Team, encompassed 455 malicious Android apps and 183 threat actor-owned command-and-control (C2) domains, turning the infrastructure into a pipeline for multi-stage fraud.
"UsersView the full article
Proof-of-concept (PoC) exploit code has now been released for a recently patched security flaw in the Linux kernel that could allow for local privilege escalation (LPE).
Dubbed DirtyDecrypt (aka DirtyCBC), the vulnerability was discovered and reported by the Zellic and V12 security team on May 9, 2026, only to be informed by the maintainers that it was a duplicate of a vulnerability that hadView the full article
In February 2026, a phishing-as-a-service (PhaaS) platform called EvilTokens went live. Within five weeks, it had compromised more than 340 Microsoft 365 organizations across five countries.
The targets of the platform received a message asking them to enter a short code at microsoft.com/devicelogin and complete their normal MFA challenge, then walked away believing they had verified aView the full article
Drupal has issued an alert stating that it intends to release a "core security release" for all supported branches on May 20, 2026, from 5-9 p.m. UTC.
"The Drupal Security Team urges you to reserve time for core updates at that time because exploits might be developed within hours or days," the maintainers of the PHP-based content management system (CMS) said.
"Not all configurations areView the full article
Critical security vulnerabilities have been disclosed in SEPPMail Secure E-Mail Gateway, an enterprise-grade email security solution, that could be exploited to achieve remote code execution and enable an attacker to read arbitrary mails from the virtual appliance.
"These vulnerabilities could have been exploited to read all mail traffic or as an entry vector into the internal network,"View the full article
Cybersecurity researchers have flagged a compromised version of the Nx Console extension that was published to the Microsoft Visual Studio Code (VS Code) Marketplace.
The extension in question is rwl.angular-console (version 18.95.0), a popular user interface and plugin for code editors like VS Code, Cursor, and JetBrains. The VS Code extension has more than 2.2 million installations. The OpenView the full article
In yet another software supply chain attack, threat actors have compromised the popular GitHub Actions workflow, actions-cool/issues-helper, to run malicious code that harvests sensitive credentials and exfiltrates them to an attacker-controlled server.
"Every existing tag in the repository has been moved to point to an imposter commit that does not appear in the action's normal commit history,View the full article
Cybersecurity researchers have discovered a fresh software supply chain attack campaign that has compromised various npm packages associated with the @antv ecosystem as part of the ongoing Mini Shai-Hulud attack wave.
"The attack affects packages tied to the npm maintainer account atool, including echarts-for-react, a widely used React wrapper for Apache ECharts with roughly 1.1 million weeklyView the full article
INTERPOL has coordinated a first-of-its-kind cybercrime crackdown across the Middle East and North Africa (MENA) that led to 201 arrests and the identification of an additional 382 suspects.
The initiative involved the efforts of 13 countries from the region between October 2025 and February 2026, aiming to investigate and neutralize malicious infrastructure, arrest perpetrators behind theseView the full article
Monday opens with a trust problem. A mail server flaw is under active use. A network control system was targeted. Trusted packages were poisoned. A fake model page pushed a stealer. Then came the familiar ransom claim: the data was returned and deleted.
The pattern is clear. One weak dependency can leak keys. One leaked key can open cloud access. One cloud foothold can become a productionView the full article
What happens when a phishing email looks clean enough to pass through security, but dangerous enough to expose the business after one click? That is the gap many SOCs still struggle with: the attacks that leave teams unsure what was exposed, who else was targeted, and how far the risk has spread.
Early phishing detection closes that gap. It helps teams move from uncertainty to evidence faster,View the full article
Supply chain attackers are not only trying to slip malicious code into trusted software. They are trying to steal the access that makes trusted software possible. Recently, three separate campaigns hit npm, PyPI, and Docker Hub in a 48-hour window, and all three targeted secrets from developer environments and CI/CD pipelines, including API keys, cloud credentials, SSH keys, and tokens. This isView the full article
Ivanti, Fortinet, n8n, SAP, and VMware have released security fixes for various vulnerabilities that could be exploited by bad actors to bypass authentication and execute arbitrary code.
Topping the list is a critical flaw impacting Ivanti Xtraction (CVE-2026-8043, CVSS score: 9.6) that could be exploited to achieve information disclosure or client-side attacks.
"External control of a file nameView the full article
Cybersecurity researchers have discovered four new npm packages containing information-stealing malware, one of which is a clone of the Shai-Hulud worm open-sourced by TeamPCP.
The list of identified packages is below -
chalk-tempalte (825 Downloads)
@deadcode09284814/axios-util (284 Downloads)
axois-utils (963 Downloads)
color-style-utils (934 Downloads)
"One of the packages (chalk-tempalte)View the full article
A new analysis of the Lua-based fast16 malware has confirmed that it was a cyber sabotage tool designed to tamper with nuclear weapons testing simulations.
According to Broadcom-owned Symantec and Carbon ****** teams, the pre-Stuxnet tool was engineered to corrupt uranium-compression simulations that are central to nuclear weapon design.
"Fast16's hook engine is selectively interested inView the full article
Chaotic Eclipse, the security researcher behind the recently disclosed Windows flaws, YellowKey and GreenPlasma, has released a proof-of-concept (PoC) for a Windows privilege escalation zero-day flaw that grants attackers SYSTEM privileges on fully patched Windows systems.
Codenamed MiniPlasma, the vulnerability impacts "cldflt.sys," which refers to the Windows Cloud Files Mini Filter Driver,View the full article
A newly disclosed security flaw impacting NGINX Plus and NGINX Open has come under active exploitation in the wild, days after its public disclosure, according to VulnCheck.
The vulnerability, tracked as CVE-2026-42945 (CVSS score: 9.2), is a heap buffer overflow in ngx_http_rewrite_module affecting NGINX versions 0.6.27 through 1.30.0. According to AI-native security company depthfirst, theView the full article
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