As of Sunday, June 21, 2026, the AI cybersecurity threat landscape is showing elevated activity across 141 tracked stories. The dominant themes today are Vulnerabilities & CVEs (43 stories), AI & LLM Threats (32 stories), and Data Breaches (19 stories). AI and LLM-based threats are particularly active with 32 stories covering topics such as prompt injection, model exploitation, deepfake campaigns, and AI-assisted attack tooling. 16 CVEs are being tracked across today's stories, including CVE-2026-4020, CVE-2026-20253, CVE-2021-22681, CVE-2024-36401 and 12 more. Each CVE badge below links directly to the NVD advisory. ⚠️ 25 stories involve critical severity, active exploitation, or zero-day conditions. Security teams should prioritize review of flagged items and verify patch status immediately.
Here’s an overview of some of last week’s most interesting news, articles, interviews and videos: A hardware neural network backdoor that hides in plain sight Deep learning systems on edge devices often rely on third-party-designed FPGAs and ASICs for…
The Gentlemen equips affiliates with a centralized EDR-killer suite, rapidly weaponizing BYOVD exploits to disable security tools before ransomware attacks. ESET published a detailed breakdown of The Gentlemen‘s technical infrastructure on June 18, the result…
A new ransomware operation named 'Prinz Eugen' prioritizes recently modified files for encryption and leaves no ransom note on the system. [...]
Microsoft has attributed a recent Mastra AI supply chain attack that compromised more than 140 npm packages to the North Korean hacking group Sapphire Sleet, also known as BlueNoroff. [...]
Threat actors are exploiting a recently patched security flaw impacting Gravity SMTP, a WordPress plugin that's installed on about 100,000 sites. The vulnerability, tracked as CVE-2026-4020 (CVSS score: 5.3), is a medium-severity information disclosure flaw…
French President Emmanuel Macron urged the world’s wealthy democracies to work together on regulating advanced AI systems. The post French President Urges US to Share Cutting-Edge AI and Democracies to Cooperate on Regulation appeared first on SecurityWeek .
FortiBleed exposed a massive campaign that made billions of login attempts against Fortinet VPNs, compromising organizations worldwide. FortiBleed wasn’t a targeted hack. It was a factory. A multi-operator crew ran an industrial-scale attack against Fortinet…
FortiBleed exposed credentials for 74,000 Fortinet devices, with attackers actively exploiting the leak to target systems worldwide. On June 18, CISA issued an emergency alert after reports surfaced that credentials for approximately 74,000 Fortinet firewalls…
Market intelligence platform Klue has publicly confirmed a recent security incident that allowed threat actors to steal OAuth tokens used to connect to customers' Salesforce environments, as the new "Icarus" extortion group publicly claims the attack. [...]
Threat actors are exploiting an unauthenticated information disclosure vulnerability in the WordPress plugin Gravity SMTP, active on 100,000 sites. [...]
Security researchers at Paradigm Shift have published a working exploit, dubbed usbliter8, that achieves arbitrary code execution inside the SecureROM of Apple's A12 and A13 chips. That code is burned into the silicon at manufacture. No software update can…
The Gentlemen ransomware-as-a-service (RaaS) operation is actively developing and maintaining a suite of endpoint detection and response (EDR) killers that it hands out to affiliates for impairing system defenses before deploying the encryptor. This mature…
Microsoft researchers have detailed an exploit chain, named AutoJack, that turns an AI browsing agent into a delivery vehicle for remote code execution. Steer the agent to load an attacker's web page, and that page's JavaScript can reach a privileged local…
Other noteworthy stories that might have slipped under the radar: Android TV botnet Popa linked to Israeli firm, Velvet Ant maintained decade-long stealth, unpatched GCP Config Connector flaw enables takeover. The post In Other News: Apple Patches Beats…
Dutch law enforcement authorities, along with counterparts from Canada , Germany, and the U.S., have disrupted malicious infrastructure associated with SocGholish and cleaned up nearly 15,000 infected WordPress websites. "With these actions we deprive…
AI agents can access data, trigger workflows, deploy code, and interact with critical business systems, often with little oversight. Token Security breaks down why AI agents are becoming a new identity and governance challenge. [...]
Cybersecurity vendor Huntress was among multiple companies hit by a breach originating at Klue, a market intelligence platform used to integrate CRM and sales data across various business tools. Huntress published a detailed account of the incident on June…
An international operation targeted the SocGholish botnet, which has been linked to the Russia-based cybercrime group Evil Corp.
Modern phishing attacks, including Device Code phishing, can undermine MFA protections and grant attackers access to corporate accounts without stealing passwords. This webinar explores how behavioral AI can help security teams detect compromised accounts…
A cryptocurrency-stealing malware campaign used inflated GitHub activity, software reviews, YouTube tutorials and favorable VirusTotal comments to make malicious trading and gambling tools appear trustworthy, Check Point researchers found. According to the…
Introduction The average enterprise security team has 40 or more security tools, giving a lot of visibility into internal telemetry and asset data. But often, these tools are working in siloes, generating (overlapping) alerts and data. And yet, breach dwell…
CryptoBandits uses a local SOCKS5 proxy for traffic routing, blending data theft with remote code execution. The post CryptoBandits Malware Doubles as a Backdoor, Abuses Tor appeared first on SecurityWeek .
Working with frontier AI models, this new platform aims to help discovering, prioritizing, validating and remediating code vulnerabilities
CISA has added CVE-2026-20253, a critical, remotely exploitable vulnerability in Splunk Enterprise, to its Known Exploited Vulnerabilities catalog, and ordered US federal civilian agencies to apply mitigations by June 21, 2026. In-the-wild exploitation has…
The large-scale credential theft campaign hit roughly half of the internet-accessible Fortinet firewalls and VPNs. The post FortiBleed: 86,000 Fortinet Device Credentials Compromised appeared first on SecurityWeek .
The first wave of enterprise AI concern was straightforward. It was simply employees pasting sensitive data into public AI tools. Security teams responded with usage policies, domain blocks, and data loss prevention rules. That response made sense at the…
SocGholish malware has been removed from 15,000 sites associated with Evil Corp hackers
A New York man faces cyberstalking charges after allegedly sharing AI-generated nude images and fabricated racist messages using fake social media profiles to harass a Georgia college student. [...]
I detected an interesting phishing email this morning. It targets a major Belgian bank: 
WideField will accelerate Agentic SOC capabilities by expanding the lens on threat investigation to include identity, credentials, sessions, and blast radius. The post Cisco to Acquire WideField Security to Boost Splunk’s Agentic SOC appeared first on…
BlackFog has announced the general availability of ADX Vision for macOS, extending its shadow AI detection, governance, and prevention platform to Apple endpoints. With this release, enterprises can now apply a single, consistent AI data-loss policy across…
The nonprofit Human Rights Watch obtained export licensing records covering 2018 through 2023, which show the Bulgarian government allowed the surveillance firm Circles to peddle the tech to law enforcement and intelligence agencies in several countries known…
For the past four years, a sprawling Android-based botnet called Popa has forced millions of consumer TV boxes to relay Internet traffic linked to advertising fraud, account takeovers, and mass data-scraping efforts. This week, researchers from multiple…
If an autonomous AI agent interacts with your company's core intellectual property today, can your security team instantly name the person who authorized it? For most enterprises, the answer is a simple no. The rush to adopt internal AI tools has left a…
The internet did not break this week. It got used exactly as designed, which is worse. Searches were siphoned through shady browser add-ons. AI chat links turned into malware delivery paths. macOS attacks ran in memory and left almost nothing behind. Cloud…
A Rust crypto clipper hides behind fake GitHub stars and AI-narrated YouTube videos
Hospital insider escapes criminal prosecution after attempting to sell royal’s medical records
Mackay Sugar said it was "working urgently" to verify claims that a highly active ransomware group was behind a cyberattack that shut down harvesting and milling operations.
Analysis of chatter on underground forums by Sophos finds that hackers fear AI could take work away from them
CloudSEK maps Operation Escaneo, a campaign hitting Latin American infrastructure via perimeter bugs
[This is a Guest Diary by Adam Nason, an ISC intern as part of the SANS.edu BACS program] 
An unknown threat actor has been observed leveraging paid or promoted posts on legitimate news websites to drum up buzz for their warez, according to new findings from Check Point Research. The threat actor also has at their disposal a dedicated WordPress…
Nisos infiltrated a North Korean IT-worker fraud cell running on AI interviews and a US laptop farm
Cybersecurity researchers have flagged a "coordinated malware campaign" on the JetBrains Marketplace that has published no less than 15 malicious plugins capable of exfiltrating artificial intelligence (AI) provider keys. "Every plugin poses as an AI coding…
The rise of AI-assistants and applications in the enterprise has seen a 93% increase in employees attempting to upload sensitive data, bringing security challenges
Filigran survey at Infosecurity Europe 2026 reveals AI-powered attacks as the top concern, with false positives, alert fatigue and manual processes draining security teams
SANS Institute study finds few SOCs have built AI into defined workflows, despite widespread adoption
As many as 145 npm packages associated with the Mastra namespace ("@mastra/*"), a popular open-source JavaScript and TypeScript framework for building artificial intelligence (AI) applications, have been compromised as part of a software supply chain attack…
A flaw in the Google Cloud Vertex AI SDK for Python let an attacker with no access to a victim's project hijack the victim's machine learning model upload and run code inside Google's serving infrastructure. Palo Alto Networks Unit 42, which found and…
The US government crackdown on Anthropic’s Claude Fable 5 and Mythos 5 hides a glaring truth: AI models with advanced hacking capabilities will soon be the norm.
Athena is a new an industry coalition to fix the vulnerabilities frontier AI models find before attackers can exploit them
A default low-privilege account on a LiteLLM proxy can climb to full admin and run code on the server by chaining three vulnerabilities, researchers at Obsidian Security disclosed LiteLLM is a widely deployed open-source AI gateway that brokers calls to more…
A single click on a trusted Microsoft link could have let an attacker pull emails, calendar details, and indexed files out of Microsoft 365 Copilot Enterprise Search. Researchers at Varonis Threat Labs chained three bugs into a one-click exfiltration path…
Stuff broke again. Not in a movie way. An old tool was left exposed. An abandoned package was abused. A deprecated feature was still running in prod. This week is the same lesson in a new form: phishing kits are easier to rent, AI names are useful bait, old…
Access to two Anthropic large language models, Mythos 5 and Fable 5, has effectively been banned to any non-US nationals by the Trump administration
Government departments find hundreds of vulnerabilities after testing frontier models
Plus: AI bug hunting fuels Microsoft’s biggest-ever Patch Tuesday, ShinyHunters ransomware gang exploits an Oracle zero-day, and more.
Anthropic said on Friday it will "abruptly disable" its most advanced artificial intelligence (AI) models, Claude Fable 5 and Mythos 5, for all users after the U.S. government ordered it to suspend access to the models for foreign nationals, whether inside or…
Google on Friday said it's pursuing legal action against a Chinese cybercrime network, accusing it of using its Gemini artificial intelligence (AI) agent to send phishing text messages targeting Americans. The network is said to be behind the development and…
Cybersecurity researchers have described what they say is a new class of attack that can trick artificial intelligence (AI) coding agents into running arbitrary code on developer machines. Called Agentjacking by Tenet Security, the attack can be triggered by…
A WIRED investigation found dozens of “nudified” deepfake images and videos on Grok's website, including nonconsensual depictions of celebrities and at least one prominent US politician.
Fake AI guides hide a multi-stage chain that drops AsyncRAT, with signs of AI-assisted coding
Organizations are aware of the challenges that new technologies like AI bring: but cybersecurity staff struggle to make time for the required training during working hours
The new open-source project could serve as the basis for a future of apps with features as complex as Slack, Discord, or Google Docs—but with added protection against surveillance.
Tenet Security researchers reveal how new “agentjacking” attacks could trick coding agents into executing arbitrary code
“Defenders cannot afford to take weeks to patch,” one Cybersecurity and Infrastructure Security Agency official warned on Wednesday.
A cybercrime group known as The Gentlemen has emerged as the second most active ransomware gang by victim count, rapidly attracting a talented pool of hackers through an aggressive recruitment strategy that promises affiliates 90 percent of any ransom paid by…
Anthropic unveils Claude Mythos 5 and Fable 5, a restricted-access frontier AI model and guardrailed version for everyone to use
Microsoft today released software updates to plug nearly 200 security holes across its Windows operating systems and supported software, a record number of fixes for the company's monthly Patch Tuesday cycle. Nearly three dozen of those bugs earned…
Anthropic is releasing Claude Mythos 5 to trusted organizations and Claude Fable 5 to the public, a version it says can’t be used for cyberattacks.
Most dev teams use AI coding assistants but only 30% have full governance in place
OpenAI brings Lockdown Mode and Active Sessions to ChatGPT to curb prompt injection data theft
At Infosecurity Europe 2026, OWASP’s Ariel Fogel warned that prompt injection remains an “unresolved problem” within generative AI architecture
Meta confirms an AI tool vulnerability led to unauthorized access to Instagram accounts after a failure in email verification during password reset
Lloyds Banking Group shared its approach for securing agentic AI workflows, with a mix of hands on experimentation and cross functional governance
The OWASP agentic AI security framework helps organizations assess governance maturity vs adoption and adjust governance as needed
Ox Security field CTO, Boaz Barzel, makes the case for vibe security to tackle AI agent coding risks
Microsoft Detection and Response Team (DART) details how it has uncovered malicious AI applications as cyber criminals manipulate organizations adopting AI tools
A Bugcrowd researcher has unveiled ExploitBench, an independent benchmark of AI models for vulnerability exploitation
Proton uses machine learning models to detect abuse of its services – especially email addresses used by cybercriminals
Inaugural Infosecurity Europe Cyber Startup Award Winner Impresses Panel with Ability Help Prioritize Vulnerabilities in AI era
Trump's executive order invites voluntary pre-release review of frontier AI models
Anthropic widens Project Glasswing access to 150 more firms as patching becomes the bottleneck
The emergence of AI models capable to autonomously find and fix vulnerabilities at scale is having a significant impact on patching management, experts say
Halcyon’s Cynthia Kaiser lifts the lid on the dark web market for AI cybercrime tools
Humans still need to be part of cyber defense, but refusing to deploy AI is no longer optional against AI-enhanced cyber threats, warns Dataminr’s Joe Slowik
Bayer’s security awareness training now focuses on psychological approaches rather than technical methods for detecting social engineering
A threat actor used AI coding tools to build and test EDR evasion malware, Sophos finds
UK organizations are prioritizing AI-driven cybersecurity as 43% cite AI-powered attacks as their top risk, prompting significant investment in advanced threat defense
The Instagram accounts for the Obama White House and the Chief Master Sergeant of the U.S. Space Force were briefly defaced with pro-Iranian images and messages over the weekend, after instructions began circulating on Telegram showing how to trick Meta's "AI…
Top cybersecurity vendors said AI won't replace entry-level – only routine ticket-taking and triage
Push Security says threat actors are delivering malware hosted on chatgpt.com/s/ domain
OWASP’s new Agentic Research Council will aim to connect academic work to operational realities on agentic AI security
Sloppy AI-generated npm infostealer leaked its own GitHub token, exposing the operator
GCHQ director urges urgent business cyber action as AI and quantum reshape the threat
UK firms plan higher cyber spending as AI adoption raises security concerns
CERT-In urges 12-hour patching of exposed flaws as AI compresses exploitation timelines
The infostealer payload in this campaign collect a vast amount of data, from collaboration authentication keys to cryptocurrency wallets
AI risks threaten to permeate supply chains through unvetted code and unaudited suppliers
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
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 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
<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,…
<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.