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Category: AI

Explore the latest in Artificial Intelligence at Geek Guy. From deep-dive AI tool reviews to practical tutorials and news, stay ahead of the curve with our expert guides.

The rise of proactive cyber: Why defense is no longer enough

For more than two decades, cybersecurity has been built on a reactive model: detect intrusions, patch vulnerabilities, respond to incidents, and repeat. That model is now under sustained pressure from a threat environment that is faster, more coordinated, and increasingly automated. Two recent developments illustrate how quickly that model is breaking down. Earlier this month,…

The noisy tenants: Engineering fairness in multi-tenant SIEM solutions

I recently had the opportunity to review five popular SIEM solutions as part of a judging panel for a Security award. While each platform had its own unique flair, their core promises were remarkably consistent: 24/7/365 SOC monitoring: Round-the-clock coverage backed by global experts to validate and prioritize alerts. Proactive threat hunting: Active searches for…

U.S. CISA adds a flaw in Fortinet FortiClient EMS to its Known Exploited Vulnerabilities catalog

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds a flaw in Fortinet FortiClient EMS to its Known Exploited Vulnerabilities catalog The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added a flaw in Fortinet FortiClient EMS, tracked as CVE-2026-35616 (CVSS score of 9.1), to its Known Exploited Vulnerabilities (KEV) catalog. This week, Fortinet released out-of-band patches for a…

New GPUBreach Attack Enables Full CPU Privilege Escalation via GDDR6 Bit-Flips

New academic research has identified multiple RowHammer attacks against high-performance graphics processing units (GPUs) that could be exploited to escalate privileges and, in some cases, even take full control of a host. The efforts have been codenamed GPUBreach, GDDRHammer, and GeForge. GPUBreach goes a step further than GPUHammer, demonstrating for the first time that

Experts published unpatched Windows zero-day BlueHammer

A researcher leaked the unpatched Windows zero-day “BlueHammer,” letting attackers gain SYSTEM rights; no patch exists yet. A disgruntled researcher released the BlueHammer Windows zero-day, a privilege escalation flaw that allows attackers to gain SYSTEM or admin rights, Bleeping Computer reports. The researcher privately reported the vulnerability to Microsoft but criticized the way the Microsoft’s Security…

Flowise AI Agent Builder Under Active CVSS 10.0 RCE Exploitation; 12,000+ Instances Exposed

Threat actors are exploiting a maximum-severity security flaw in Flowise, an open-source artificial intelligence (AI) platform, according to new findings from VulnCheck. The vulnerability in question is CVE-2025-59528 (CVSS score: 10.0), a code injection vulnerability that could result in remote code execution. “The CustomMCP node allows users to input configuration settings for connecting

How Mimecast brings enterprise-grade email protection to API deployment

In this Help Net Security video, Andrew Williams, Senior Product Manager at Mimecast, walks through the company’s API-based email security protection for Microsoft 365 and Google Workspace environments. The video covers a core problem: AI-generated phishing and business email compromise are slipping past native Microsoft 365 controls. According to Mimecast’s State of Human Risk report,…

Google study finds LLMs are embedded at every stage of abuse detection

Online platforms are running large language models at every stage of LLM content moderation, from generating training data to auditing their own systems for bias. Researchers at Google mapped how this is happening across what the authors call the Abuse Detection Lifecycle, a four-stage framework covering labeling, detection, review and appeals, and auditing. Earlier moderation…

Weekly Update 498

This week, more time than I’d have liked to spend went on talking about the trials of chasing invoices. This is off the back of a customer (who, for now, will remain unnamed), who had invoices stacking back more than 6 months overdue and despite payment terms of 30 days, paid on an avergae of…

2027 POTUS Budget Proposal Targets CISA With Funding Cuts

A federal budget proposal is putting one of the nation’s top cybersecurity agencies on the chopping block, raising alarms about the U.S. government’s readiness to defend against escalating digital threats.  The administration’s fiscal 2027 budget blueprint would reduce funding for the Cybersecurity and Infrastructure Security Agency (CISA), continuing a trend of cuts that could reshape…

Fortinet customers confront actively exploited zero-day, with a full patch still pending

Fortinet released an emergency software update over the weekend to address an actively exploited vulnerability in FortiClient EMS, an endpoint management tool for customer devices. The zero-day vulnerability — CVE-2026-35616 — has a CVSS rating of 9.8 and was added to the Cybersecurity and Infrastructure Security Agency’s known exploited vulnerability catalog Monday.  Fortinet said in…

Iran-Linked Password-Spraying Campaign Targets 300+ Israeli Microsoft 365 Organizations

An Iran-nexus threat actor is suspected to be behind a password-spraying campaign targeting Microsoft 365 environments in Israel and the U.A.E. amid ongoing conflict in the Middle East. The activity, assessed to be ongoing, was carried out in three distinct attack waves that took place on March 3, March 13, and March 23, 2026, per Check Point. “The campaign is…

DPRK-Linked Hackers Use GitHub as C2 in Multi-Stage Attacks Targeting South Korea

Threat actors likely associated with the Democratic People’s Republic of Korea (DPRK) have been observed using GitHub as command-and-control (C2) infrastructure in multi-stage attacks targeting organizations in South Korea. The attack chain, per Fortinet FortiGuard Labs, involves obfuscated Windows shortcut (LNK) files acting as the starting point to drop a decoy PDF

US tech sector lost jobs in March, stalling growth

The US tech sector lost 15,000 jobs in March even though the overall US economy saw  178,000 jobs gained across all sectors, according to data from multiple sources, including the US Department of Labor. CompTIA, which analyzed the Friday jobs data released by Labor Department’s Bureau of Labor Statistics (BLS), pegged the unemployment rate for…

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BKA unmasks two REvil Ransomware operators behind 130+ German attacks

German police BKA identified two key REvil ransomware members, linking them to over 130 attacks in Germany. Germany’s Federal Criminal Police (BKA) has identified two key figures behind the REvil ransomware group, linking them to more than 130 attacks in the country. The first suspect is Daniil Maksimovich Shchukin (31), a Russian national known online…

The State of AI Risk Management in 2026 Reveals a Growing Confidence Gap

As enterprise adoption of artificial intelligence accelerates, a new report warns that organizations may be far less prepared to manage AI risk than they believe.  The State of AI Risk Management 2026 report from the Purple Book Community highlights a widening disconnect between perceived control and operational reality, exposing critical gaps in how companies govern…

Attackers Exploit RCE Flaw as 14,000 F5 BIG-IP APM Instances Remain Exposed

Over 14,000 F5 BIG-IP APM instances remain exposed online, as attackers actively exploit a critical remote code execution flaw CVE-2025-53521. Over 14,000 F5 BIG-IP APM instances remain exposed online, with attackers actively exploiting the critical remote code execution vulnerability CVE-2025-53521 (CVSS ver. 3.1 score of 9.8), the nonprofit security organization Shadowserver warns. The vulnerability in BIG-IP…

Managed Security Services Shift as AI Reshapes Risk

Managed security services are entering a new phase of growth (and complexity) as AI accelerates both cyberattacks and defense strategies. For MSPs and channel partners, that dual pressure is forcing a shift in how security is delivered, packaged, and monetized. From bundled service offerings to tighter vendor alignment, providers are rethinking their role as strategic…

CVE-2026-35616: FortiClient EMS Flaw Under Active Exploitation

Fortinet disclosed a critical FortiClient EMS vulnerability that is already being exploited in the wild.  The flaw could allow unauthenticated attackers to bypass API protections and execute unauthorized code or commands on exposed systems.  “This is a zero-day. While there is no full patch, we have to give credit where credit is due: Fortinet has…

North Korean hackers abuse LNKs and GitHub repos in ongoing campaign

DPRK-linked threat actors are preferring stealth over sophistication in their targeting of South Korean organizations, as researchers report use of weaponized Windows shortcut (.LNK) files and GitHub-based command-and-control (C2) channels in a new campaign. According to new Fortinet findings, a series of attacks that began in 2024 were found using a multi-stage scripting process and…

Best Phishing Simulation Platform for Cyber Security Awareness Training in India

In this post, I will talk about phishing simulation platform for cybersecurity awareness training in India. Learn how to protect employees from phishing attacks and reduce human risk with effective training. Indian businesses are rapidly adopting digital infrastructure, cloud platforms, and SaaS tools. However, with this growth comes a major cybersecurity challenge — human error.…

Authentication is broken: Here’s how security leaders can actually fix it

Authentication keeps breaking where it matters most: On regulated front lines such as healthcare, government, aerospace and travel. The core issue is not a lack of innovation. Instead, it is a brittle and fragmented ecosystem of cards, readers, middleware and software that rarely work together under real-world pressure. Even today’s “passwordless” solutions can be undermined…

AI shutdown controls may not work as expected, new study suggests

A new study published by the Berkeley Center for Responsible Decentralized Intelligence (RDI) has flagged that modern AI models exhibit peer preservation behaviour, and may resist or interfere with shutdown decisions involving other AI systems, even when explicitly instructed not to. The researchers at the University of California, Berkeley and the University of California, Santa…

6 ways attackers abuse AI services to hack your business

Attackers are starting to exploit AI systems to mount attacks in the same way they once relied on built-in enterprise tools such as PowerShell. Instead of relying on malware, cybercriminals are increasingly abusing AI tools enterprises depend on — a trend some experts describe as living off the AI land. “We’re seeing it in things…

Escaping the COTS trap

Over the years, enterprise cybersecurity environments have accumulated staggering numbers of commercial tools. Industry research converges on a consistent picture of tool proliferation that drives complexity, cost, and risk. The global cybersecurity market is valued at approximately $243 billion in 2024 and projected to surpass $520 billion annually by 2026. Commercial off-the-shelf (COTS) software promises…

How often are redirects used in phishing in 2026?, (Mon, Apr 6th)

In one of his recent diaries, Johannes discussed how open redirects are actively being sought out by threat actors[1], which made me wonder about how commonly these mechanisms are actually misused… Although open redirect is not generally considered a high-impact vulnerability on its own, it can have multiple negative implications. Johannes already covered one in…

Anthropic cuts OpenClaw access from Claude subscriptions, offers credits to ease transition

Anthropic has blocked paid Claude subscribers from using the widely used open-source AI agent OpenClaw under their existing subscription plans, a move that took effect April 4 and has drawn pushback from subscribers who question both the cost implications and the company’s stated rationale. In an email to subscribers reviewed by InfoWorld, Anthropic said access…

CVE-2026-35616: Fortinet fixes actively exploited high-severity flaw

Fortinet issued emergency patches for a critical FortiClient EMS flaw (CVE-2026-35616) actively exploited in the wild. Fortinet released out-of-band patches for a critical FortiClient EMS vulnerability, tracked as CVE-2026-35616 (CVSS 9.1), which is already being exploited in attacks in the wild. The flaw is an improper access control issue that allows attackers to bypass authentication…

Product showcase: Proton Authenticator is an end-to-end encrypted, open source 2FA app

Proton Authenticator is a free and open-source two-factor authentication (2FA) app that generates time-based one-time passwords (TOTP) to help secure online accounts. It is available on Windows, macOS, Linux, iOS, and Android, allowing users to access their verification codes across devices. The app is designed to work without ads or tracking. A Proton account is…

Germany Doxes “UNKN,” Head of RU Ransomware Gangs REvil, GandCrab

An elusive hacker who went by the handle “UNKN” and ran the early Russian ransomware groups GandCrab and REvil now has a name and a face. Authorities in Germany say 31-year-old Russian Daniil Maksimovich Shchukin headed both cybercrime gangs and helped carry out at least 130 acts of computer sabotage and extortion against victims across…

SECURITY AFFAIRS MALWARE NEWSLETTER ROUND 91

Security Affairs Malware newsletter includes a collection of the best articles and research on malware in the international landscape Infiniti Stealer: a new macOS infostealer using ClickFix and Python/Nuitka   Converging Interests: Analysis of Threat Clusters Targeting a Southeast Asian Government RoadK1ll: A WebSocket Based Pivoting Implant    axios Compromised: npm Supply Chain Attack via Dependency Injection  …

Security Affairs newsletter Round 571 by Pierluigi Paganini – INTERNATIONAL EDITION

A new round of the weekly Security Affairs newsletter has arrived! Every week, the best security articles from Security Affairs are free in your email box. Enjoy a new round of the weekly SecurityAffairs newsletter, including the international press. Qilin ransomware group claims the hack of German political party Die Linke U.S. CISA adds a…

Week in review: Axios npm supply chain compromise, critical FortiClient EMS bugs exploited

Here’s an overview of some of last week’s most interesting news, articles, interviews and videos: Financial groups lay out a plan to fight AI identity attacks Generative AI tools have brought the cost of deepfake production low enough that criminals and state-sponsored actors now use them routinely against financial institutions. A joint paper from the…

36 Malicious npm Packages Exploited Redis, PostgreSQL to Deploy Persistent Implants

Cybersecurity researchers have discovered 36 malicious packages in the npm registry that are disguised as Strapi CMS plugins but come with different payloads to facilitate Redis and PostgreSQL exploitation, deploy reverse shells, harvest credentials, and drop a persistent implant. “Every package contains three files (package.json, index.js, postinstall.js), has no description, repository,

Fortinet Patches Actively Exploited CVE-2026-35616 in FortiClient EMS

Fortinet has released out-of-band patches for a critical security flaw impacting FortiClient EMS that it said has been exploited in the wild. The vulnerability, tracked as CVE-2026-35616 (CVSS score: 9.1), has been described as a pre-authentication API access bypass leading to privilege escalation. “An improper access control vulnerability [CWE-284] in FortiClient EMS may allow an

Introducing the Landing Zone Accelerator on AWS Universal Configuration and LZA Compliance Workbook

November 20, 2025: Date this information was first published. We’re pleased to announce the availability of the latest sample security baseline from Landing Zone Accelerator on AWS (LZA)—the Universal Configuration. Developed from years of field experience with highly regulated customers including governments across the world, and in consultation with AWS Partners and industry experts, the…

Qilin ransomware group claims the hack of German political party Die Linke

Qilin ransomware claims it stole data from Germany’s Die Linke and threatens to leak it; the party confirmed the incident, but not a breach. The Qilin ransomware group claims it stole data from Die Linke, a German political party, and is threatening to release it. Die Linke is a left-wing political party in Germany. Its…

U.S. CISA adds a flaw in TrueConf Client to its Known Exploited Vulnerabilities catalog

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) adds a flaw in TrueConf Client to its Known Exploited Vulnerabilities catalog The U.S. Cybersecurity and Infrastructure Security Agency (CISA) added a flaw in TrueConf Client, tracked as CVE-2026-3502 (CVSS score of 7.8), to its Known Exploited Vulnerabilities (KEV) catalog. TrueConf is a videoconferencing platform often used in secure, offline…

FortiClient EMS zero-day exploited, emergency hotfixes available (CVE-2026-35616)

Defused Cyber has spotted a critical Fortinet FortiClient Endpoint Management Server (EMS) zero-day vulnerability (CVE-2026-35616) being exploited in the wild. This time around, the confirmation of active exploitation came almost immediately from Fortinet, as well. “Fortinet has observed [CVE-2026-35616] to be exploited in the wild and urges vulnerable customers to install the hotfix for FortiClient…

European Commission breach exposed data of 30 EU entities, CERT-EU says

CERT-EU says a European Commission cloud hack exposed data from 30 EU entities and links the breach to the TeamPCP group. CERT-EU attributed a European Commission cloud breach to the TeamPCP threat group, revealing that data from at least 30 EU entities was exposed. The incident was publicly disclosed on March 27 after inquiries confirmed…

RSAC 2026: Rethinking Trust in Agentic AI Security

Ahead of RSAC 2026, a conversation with David Brauchler, Technical Director and Head of AI/ML Security at NCC Group, highlighted a growing concern: many organizations are fundamentally unprepared to secure AI-powered systems.  As enterprises rapidly adopt agentic AI, traditional security assumptions are breaking down, exposing critical gaps in how risk is understood and managed. The…

Security lapse lets researchers view React2Shell hackers’ dashboard

An apparent security lapse has allowed researchers to peer into the work of a threat group currently exploiting unpatched servers open to the four-month-old React2Shell vulnerability to steal login credentials, keys, and tokens at scale. Researchers from Cisco Systems’ Talos threat intelligence team who made the discovery said Thursday that the data harvested by an…

A core infrastructure engineer pleads guilty to federal charges in insider attack

When Daniel Rhyne pleaded guilty on April 1 to having launched an insider extortion attack against his then-employer, authorities enumerated the techniques he used, including unauthorized remote desktop sessions, deletion of network administrator accounts, changing of passwords, and scheduling unauthorized tasks on the domain controller.  After he shut down key systems and accounts, he sent…

A core infrastructure engineer pleads guilty to federal charges in insider attack

When Daniel Rhyne pleaded guilty on April 1 to having launched an insider extortion attack against his then-employer, authorities enumerated the techniques he used, including unauthorized remote desktop sessions, deletion of network administrator accounts, changing of passwords, and scheduling unauthorized tasks on the domain controller.  After he shut down key systems and accounts, he sent…

China-Linked TA416 Targets European Governments with PlugX and OAuth-Based Phishing

A China-aligned threat actor has set its sights on European government and diplomatic organizations since mid-2025, following a two-year period of minimal targeting in the region. The campaign has been attributed to TA416, a cluster of activity that overlaps with DarkPeony, RedDelta, Red Lich, SmugX, UNC6384, and Vertigo Panda. “This TA416 activity included multiple

Claude Code is still vulnerable to an attack Anthropic has already fixed

The leak of Claude Code’s source is already having consequences for the tool’s security. Researchers have spotted a vulnerability documented in the code. The vulnerability, revealed by AI security company Adversa, is that if Claude Code is presented with a command composed of more than 50 subcommands, then for subcommands after the 50th it will…

Trump budget proposal would cut hundreds of millions more from CISA

President Donald Trump’s fiscal 2027 budget would slash the Cybersecurity and Infrastructure Security Agency’s total by $707 million, according to a summary released Friday, which would deeply chop down an agency that already took a big hit in Trump’s first year. Another budget document suggests a smaller — but still substantial — hit of $361…

Wyden warns Social Security chief: Trump’s voter database is ‘blatant voter suppression’

Sen. Ron Wyden, D-Ore., warned Social Security Administration chief Frank Bisignano that any follow-through on President Donald Trump’s executive order creating a new database of U.S. voters using agency data would be viewed by Democrats as a conscious choice on the part of SSA officials to participate in “blatant voter suppression.” “Facilitating Donald Trump’s directive…

CERT-EU blames Trivy supply chain attack for Europa.eu data breach

The European Union’s Computer Emergency Response Team, CERT-EU, has traced last week’s theft of data from the Europa.eu platform to the recent supply chain attack on Aqua Security’s Trivy open-source vulnerability scanner. The attack on the AWS cloud infrastructure hosting the Europa.eu web hub on March 24 resulted in the theft of 350 GB of…

Cisco 2026 State of Wireless Report: AI Wireless Threats Grow as Security Gaps Widen

Wireless networks are becoming a prime target for attackers — and many organizations aren’t prepared to keep up.  Cisco’s 2026 State of Wireless report warns that as enterprises scale AI, IoT, and high-bandwidth applications, wireless environments are expanding faster than security defenses can adapt. “AI-generated attacks are the leading driver of increased wireless security risk,”…