As of Sunday, May 31, 2026, the AI cybersecurity threat landscape is showing elevated activity across 122 tracked stories. The dominant themes today are AI & LLM Threats (41 stories), Vulnerabilities & CVEs (37 stories), and Data Breaches (19 stories). AI and LLM-based threats are particularly active with 41 stories covering topics such as prompt injection, model exploitation, deepfake campaigns, and AI-assisted attack tooling. 18 CVEs are being tracked across today's stories, including CVE-2026-0257, CVE-2026-26980, CVE-2026-39987, CVE-2026-35616 and 14 more. Each CVE badge below links directly to the NVD advisory. ⚠️ 21 stories involve critical severity, active exploitation, or zero-day conditions. Security teams should prioritize review of flagged items and verify patch status immediately.
CVE-2026-0257 lets attackers forge Palo Alto GlobalProtect auth cookies and bypass VPN login. Exploitation confirmed since May 17. Palo Alto Networks addressed the vulnerability CVE-2026-0257 on May 13. Two weeks later, cybersecurity firm Rapid7 confirmed…
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Hackers are targeting WordPress websites running a vulnerable version of the WP Maps Pro plugin, which allows creating rogue administrator accounts without authentication. [...]
Dutch authorities have announced the takedown of a botnet that enslaved millions of infected devices, including computers, tablets, smartphones, and IoT devices, to carry out malicious attacks. The bot network, per the Dutch Politie and the National Cyber…
Here’s an overview of some of last week’s most interesting news, articles, interviews and videos: Coinflow CISO on crypto payments security under AI pressure Crypto payment firms sit near the top of the target list for advanced persistent threat groups, and…
Palo Alto Networks is warning that hackers are now exploiting a PAN-OS GlobalProtect authentication bypass flaw, tracked as CVE-2026-0257, in attacks attempting to breach corporate networks. [...]
The one-click vulnerability allows attackers to execute arbitrary code on self-hosted Flowise servers by tricking users into importing a malicious chatflow. The post Exploit Code Published for Critical Flowise RCE Vulnerability appeared first on SecurityWeek .
A newly discovered local privilege escalation vulnerability dubbed 'CIFSwitch' in the Linux kernel could allow attackers to forge CIFS authentication key descriptions, abuse the kernel's key request mechanism, and gain root privileges. [...]
Plus: A ransomware group is now stealing data in person, BusPatrol wants to hand its license plate surveillance data to the cops, and more.
Palo Alto Networks has warned that a recently disclosed medium-severity security flaw impacting PAN-OS and Prisma Access has come under active exploitation in the wild. The vulnerability, tracked as CVE-2026-0257 (CVSS score: 7.8), refers to a case of…
GREYVIBE, a Russia-linked group active since 2025, targets Ukraine with AI-assisted malware and five attack chains. Researchers say it’s part spy op, part crime gang. Security firm WithSecure has been tracking a previously unknown Russian-linked APT group…
Threat actors are abusing ChatGPT's content-sharing feature to display fake OpenAI outage pages that direct users to download malware disguised as the ChatGPT desktop application. [...]
Cybersecurity researchers have disclosed details of a vulnerability in OpenAI ChatGPT that leverages the artificial intelligence (AI) assistant's implicit trust in Markdown links and images to trigger prompt injections and open the door to phishing attacks.…
Noteworthy stories that might have slipped under the radar: Trump Mobile exposes customer data, phishers target the 2026 FIFA World Cup, CISA responds to recent supply chain attacks. The post In Other News: Trump Mobile Data Breach, FIFA World Cup Phishing,…
The notorious ShinyHunters extortion group leaked over 42 million records allegedly stolen from Charter in April. The post Charter Communications Data Breach Could Impact Nearly 5 Million appeared first on SecurityWeek .
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 Dutch National Police and the country’s National Cyber Security Center (NCSC) have taken offline 200 servers controlling a botnet of 17 million devices, the law enforcement agency announced on Thursday. The investigation was launched after the NCSC…
Each vulnerability was published with working proof-of-concept code to the Microsoft-owned code repository GitHub, making them immediately available to both attackers and security professionals.
Threat actors from the Silent Ransom Group, aka Luna Moth, are escalating attacks by impersonating IT staff in phone calls and even showing up in person to gain direct access to victim systems
Attackers are delivering a broad-spectrum infostealer to enterprise computers by exploiting a known vulnerability (CVE-2026-35616) in FortiClient Enterprise Management Server (EMS). “The [malicious] payload was presented as a Fortinet endpoint update and…
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…
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…
A newly documented phishing campaign is targeting professionals with fake LinkedIn business emails and abusing a trusted service operated by Adobe. The attack from the victim’s perspective The attack starts with an email that looks, at first glance, like a…
Microsoft 365 Copilot, an AI assistant that helps people write, summarize, analyze information, and complete work tasks, has been redesigned. It now serves as a single, flexible entry point to Copilot across Microsoft 365 apps, suggesting relevant actions…
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…
ESET’s 2026 APT Activity Report suggests China-backed APTs are using instability in the region to target victims, as well as continuing activity against organizations around the globe
Sloppy AI-generated npm infostealer leaked its own GitHub token, exposing the operator
Anthropic has released Claude Opus 4.8 and outlined plans for broader access to its Mythos-class models, which the company expects to make available to all customers in the coming weeks. Claude Opus 4.8 (Source: Anthropic) Claude Opus 4.8 is available to all…
Claroty has launched Claroty Claire, a CPS-native AI security agent designed to help organizations defend mission-critical infrastructure. Claire is powered by a CPS language model trained on more than a decade of industry expertise and CPS-related data. The…
Anthropic has confirmed that it plans to bring Mythos-class models to the general public after delaying the rollout due to security risks to public and private software. [...]
A likely Russian threat cluster tracked as GreyVibe has been targeting Ukrainian entities with AI-generated lures and a rich set of custom malware tools. [...]
Researchers warn GreyVibe’s extensive use of ChatGPT, Gemini, and other AI tools offers a glimpse into how future cybercriminal and state-aligned groups will operate. The post Russia-Linked ‘GreyVibe’ Attackers Use AI to Supercharge Cyberattacks appeared…
The funding round was led by Balderton Capital, with additional support from Crosspoint Capital and previous investors General Catalyst and Ten Eleven Ventures. The post Geordie Raises $30 Million for AI Security and Governance Platform appeared first on…
Most malicious open source packages now mimic real code rather than rely on typosquatting
The company said the threat actor gained access to a limited portion of its IT environment last month after compromising an employee account. By the end of April, Carnival determined that the attacker had copied personal information from its systems.
Prosecutors said the man spent years using fake online identities to contact children and manipulate them into sending sexually explicit images and videos.
Every time you think the industry has finally stopped doing some reckless, low-effort crap, somebody spins up a fresh box full of sketchy loaders, fake installers, recycled social-engineering bait, and enough exposed infrastructure to make you wonder if prod…
State of AI Usage Report 2026 (full report here) by LayerX Security reveals the extent of the enterprise AI visibility gap and why most organizations still don't understand where their AI exposure is actually coming from. The research shows that enterprise AI…
Customer data from more than 350 hotels around the world may have been accessed as part of realistic reservation-hijacking scams.
GCHQ director urges urgent business cyber action as AI and quantum reshape the threat
Most Akira write-ups focus on the ransom note or the encryption routine. By the time those show up the interesting forensic work is over. The questions that matter to defenders sit earlier. How did they get in. When did they get domain admin. What did they…
Cybersecurity researchers have discovered a new malicious package on the npm registry that comes with information stealing capabilities. According to OX Security, the package, named "mouse5212-super-formatter," is designed to upload files from…
When an employee installs an AI writing assistant, connects a coding copilot to their IDE, or starts summarizing meetings with a new browser tool, they are doing exactly what a productive employee should do: finding faster ways to work. Across most…
UK firms plan higher cyber spending as AI adoption raises security concerns
Microsoft has warned of an active cryptojacking campaign that makes use of artificial intelligence (AI) chatbot interactions as a mechanism for surfacing malicious download sites. "This emerging delivery technique extends social engineering beyond…
Every single day, hackers are finding new ways to crash websites and steal data. But right now, something has changed. Hackers are no longer working alone. They are now using powerful Artificial Intelligence (AI) tools to make their attacks faster, stronger,…
CERT-In urges 12-hour patching of exposed flaws as AI compresses exploitation timelines
As Americans stew over the looming risk of job-stealing AI and data centers in their back yards, the feds are raising the alarm about a new category of threat, documents obtained by WIRED show.
The Indian Computer Emergency Response Team (CERT-In) has issued new guidelines requiring organizations to patch critical security vulnerabilities in internet-exposed systems within 12 hours of being flagged where "feasible" to safeguard against potential…
Introduction 
TeamPCP now operates across three package ecosystems in parallel, it reached GitHub&#;x26;#;39;s own internal codebase, it trojanized an officially Microsoft-published Python SDK, and it appears to have open-sourced its own…
Authorities in the Netherlands have arrested the co-owners of two related Internet hosting companies for operating IT infrastructure used by Russia to carry out cyberattacks, influence operations and disinformation campaigns inside the European Union. The two…
Ask a cybersecurity pro about Network Detection and Response (NDR) and you might still hear "Noisy," "Too much data." But ask the teams running NDR that includes agentic AI capabilities and you'll hear they're actually using it to catch threats earlier,…
As attackers ramp up their AI exploit development, the search for software vulnerabilities is changing rapidly.
Anthropic on Friday disclosed that Project Glasswing has helped uncover more than 10,000 high- or critical-severity vulnerabilities across some of the most "systemically" important software across the world since the cybersecurity initiative went live last…
Plus: Google publishes a live exploit for an unpatched flaw, the feds arrest two men accused of creating thousands of nonconsensual deepfake nudes, and more.
Lawmakers in both houses of Congress are demanding answers from the U.S. Cybersecurity & Infrastructure Security Agency (CISA) after KrebsOnSecurity reported this week that a CISA contractor intentionally published AWS GovCloud keys and a vast trove of other…
The infostealer payload in this campaign collect a vast amount of data, from collaboration authentication keys to cryptocurrency wallets
Canadian authorities on Wednesday arrested a 23-year-old Ottawa man on suspicion of building and operating Kimwolf, a fast spreading Internet-of-Things botnet that enslaved millions of devices for use in a series of massive distributed denial-of-service…
AI risks threaten to permeate supply chains through unvetted code and unaudited suppliers
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.…
GitHub is just the latest victim of TeamPCP, a gang that has carried out a spree of software supply chain attacks that has impacted hundreds of organizations.
A new study finds AI companies, defense firms, and dating apps are among 38 data collectors allegedly using manipulative design to confuse users while collecting their data.
AI-powered vulnerability scanning leaves no excuse for unpatched bugs as the EU Cyber Resilience Act pushes firms toward secure-by-design software
Digital.ai data reveals 87% of apps were attacked over the past year
The UK’s National Cyber Security Centre is helping organizations to understand agentic AI security risks
The UK’s financial authorities have set expectations for the sector on cybersecurity and operational resilience
Plus: Instructure’s Canvas ransomware debacle comes to a close, an alleged dark net market kingpin gets arrested, OpenAI workers fall victim to a supply chain attack, and more.
Semperis study finds 74% of organizations believe AI will increase attacks on identity infrastructure
The Information Commissioner’s Office has released new guidance on how to mitigate the risk of AI-powered attacks
The company says its new Incognito Chat allows you to use its AI chatbot without anyone else—including Meta—being able to access your conversations.
The G7 Cybersecurity Working Group releases new SBOM for AI guidance, outlining seven key data clusters to boost transparency and security across AI supply chains
UK cybersecurity sector reaches £14.7bn in revenue, driven by rapid growth in AI security firms, increased investment and rising employment across the industry
Artificial intelligence platforms may be just as susceptible to social engineering as human beings, but they are proving remarkably good at finding security vulnerabilities in human-made computer code. That reality is on full display this month with some of…
With Daybreak, OpenAI wants its frontier AI models to be used to deploy secure by design software from the ground up
HiddenLayer reveals infostealer malware in a Hugging Face repository
Ontinue uncovers fake Claude Code installer pushing PowerShell stealer abusing Chrome's IElevator2
Google Threat Intelligence Group details how cybercriminals attempted to launch a campaign based around an AI-developed Zero-Day targeting open-source software
Traditional network security tools are undermining data protection, with Forrester and Capital One Software research warning AI adoption is impossible without rethinking data security
Oasis Security finds critical Cline kanban WebSocket flaw exposing AI coding agents to hijack
Commercial AI models were used to help plan and conduct cyber-attack against operational technology of a water and drainage facility, say researchers
Sophos finds fake Claude site spreading DonutLoader and a new Beagle backdoor via DLL sideloading
ISACA report warns that while AI has become the norm, many organizations are yet to formally apply safety or security policies around its use
OpenAI announced its intention to expand the Trusted Access for Cyber program for cyber defenders at the federal, state and local government levels
Claude Security enters public beta, giving enterprises AI driven code scanning with no API integration or custom agents required
A researcher from offensive security firm Theori has found a nine-year-old flaw in the Linux kernel with the help of AI
Marsh’s 2026 People Risks survey finds cyber‑related challenges dominate, as cyber‑threat literacy tops risks and cyber and AI skills shortages rise
Researchers uncover a malicious npm dependency linked to an AI‑assisted code commit that steals sensitive data and exposes crypto wallets
AI tools are not just creating new vulnerabilities, they are reviving old security failures, warned Jurgen Kutscher, VP of Mandiant Consulting
Google Cloud’s COO advocated for combining general-purpose frontier large language models with task-specific AI agents
Google Cloud will attribute a unique cryptographic ID every AI agent that will be tied to “traceable and auditable” authorization policies
Forcepoint has found 10 new indirect prompt injection attacks targeting AI agents
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Data exposure, operational disruption and financial losses among issues faced by businesses struggling with the rapid rise of AI agents, warns Cloud Security Alliance report
AI models are making rapid gains in vulnerability research and exploit development, raising new cybersecurity risks, a Forescout study finds
OpenAI’s new frontier model focused on cybersecurity comes following Anthropic’s launch of Claude Mythos Preview and Project Glasswing
At VulnCon, Lindsey Cerkovnik, head of vulnerability management at CISA, said AI companies should play a bigger role in vulnerability disclosures in the future
The AISI has issued its judgement on Anthropic’s Mythos Preview model
SANS Institute reveals that AI agents are behind a 76% surge in non-human identities
Google API key flaw exposes mobile apps to Gemini AI access, private files and billing risks
Anthropic launches Project Glasswing, using its Claude Mythos Preview AI to autonomously identify and fix undiscovered vulnerabilities in critical software
Anthropic’s Claude AI has helped researchers find a vulnerability in Apache ActiveMQ Classic
GrafanaGhost chains AI prompt injection and URL flaws to exfiltrate sensitive Grafana data
Cryptocurrency scams alone cost victims over $7 billion, while AI-enabled fraud threats are on the rise, says FBI
<h2><strong>Advisory at a Glance</strong></h2> <table> <tbody> <tr> <th>Title</th> <td>Iranian-Affiliated Cyber Actors Exploit Programmable Logic Controllers Across US Critical Infrastructure</td> </tr> <tr> <th>Original Publication</th> <td>April 7,…
OpenAI has patched vulnerability, which Check Point said was because of a DNS loophole
Researchers at ReliaQuest warn of persistent malware campaign targeting enterprise credentials
Security researchers from Georgia Tech have observed a surge in reported CVEs for which the flaw was introduced by AI-generated code
PwC Annual Threat Dynamics report says AI-threats are the biggest concern of clients
OpenAI’s Safety Bug Bounty program seeks to address AI safety vulnerabilities beyond traditional security flaws
Python package LiteLLM compromised with credential-stealing malware linked to TeamPCP threat group
Expel has warned of malicious Chrome extensions stealing users’ AI conversations
ISACA survey found that confusion over responsibility and lack of understanding around AI cyber-attacks makes containing them difficult
<h2><strong>Summary</strong></h2> <p><strong>Note:</strong> This joint Cybersecurity Advisory is being published as an addition to the Cybersecurity and Infrastructure Security Agency (CISA) May 6, 2025, joint fact sheet <a…
<h2><strong>Advisory at a Glance</strong></h2> <table> <tbody> <tr> <td>Executive Summary</td> <td>CISA began incident response efforts at a U.S. federal civilian executive branch (FCEB) agency following the detection of potential malicious activity…
<h2><strong>Executive summary</strong></h2> <p>People’s Republic of China (PRC) state-sponsored cyber threat actors are targeting networks globally, including, but not limited to, telecommunications, government, transportation, lodging, and military…
<h2><strong>Executive Summary</strong></h2> <p>This joint cybersecurity advisory (CSA) highlights a Russian state-sponsored cyber campaign targeting Western logistics entities and technology companies. This includes those involved in the coordination,…
2.5 million people were affected, in a breach that could spell more trouble down the line.
Researchers uncover a watering hole attack likely carried out by APT TA423, which attempts to plant the ScanBox JavaScript-based reconnaissance tool.
Over 130 companies tangled in sprawling phishing campaign that spoofed a multi-factor authentication system.