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Massive security flaw puts most popular browsers at risk on Mac

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Massive security flaw puts most popular browsers at risk on Mac

Hackers are already flooding browsers with malware and phishing links, and now researchers have discovered a vulnerability that gives them direct access to services on your laptop. 

This vulnerability, known as 0.0.0.0 Day, affects all Chromium-based browsers, including Google Chrome, Firefox, Safari and Edge. 

What’s concerning is that this vulnerability has been present in these browsers for the past 18 years and has only been discovered now.

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A person using a laptop with Google Chrome browser  (Kurt “CyberGuy” Knutsson)

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What you need to know

The 0.0.0.0 Day vulnerability was discovered by the Israeli app security firm Oligo and subsequently reported by The Hacker News. It involves the use of IP address, 0.0.0.0, which is normally harmless. But with this vulnerability, attackers could misuse it to access and control local services on your computer.

The critical vulnerability “exposes a fundamental flaw in how browsers handle network requests, potentially granting malicious actors access to sensitive services running on local devices,” Oligo Security researcher Avi Lumelsky said.

Security researchers have found that websites with “.com” domains can communicate with services on a local network and run unauthorized code using the address 0.0.0.0. This vulnerability also allows them to bypass Private Network Access (PNA), which is supposed to stop public websites from accessing private network endpoints directly.

In simple terms, this vulnerability could allow bad actors to break into your local services and execute unauthorized actions on your device.

The vulnerability affects browsers including Google Chrome, Edge, Safari and Firefox on devices running macOS and Linux. If you’re a Windows user, you don’t have to worry because Microsoft blocks this IP address at the operating system level.

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A browser displayed on a laptop   (Kurt “CyberGuy” Knutsson)

HERE’S WHAT RUTHLESS HACKERS STOLE FROM 110 MILLION AT&T CUSTOMERS

Is a fix coming?

Chrome started blocking access to the IP address 0.0.0.0 from Chromium 128 in July. Google will gradually roll out this change, completing it by Chrome 133, when the IP address will be fully blocked for all Chrome and Chromium users.

Meanwhile, Apple has already updated WebKit, the browser engine used by Safari, to block access to 0.0.0.0. Mozilla has also blocked this IP address in Firefox. To protect yourself from getting affected, keep your browser up to date.

HOW TO REMOVE YOUR PRIVATE DATA FROM THE INTERNET 

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Steps to update your browser

The best way to protect yourself from security flaws is to keep your browser up to date. Below are the steps to keep it updated.

How to update Chrome

  • Open Google Chrome on your computer
  • Click on the three dots in the top-right corner
  • Select Help
  • Click About Chrome
  • Chrome will automatically check for updates. If an update is available, it will download and install it.
  • Click Relaunch to complete the update process.

For mobile devices, you can update Chrome via the Google Play Store (Android) or App Store (iOS) by searching for Chrome and tapping Update if available

Google Chrome browser   (Kurt “CyberGuy” Knutsson)

WORLD’S LARGEST STOLEN PASSWORD DATABASE UPLOADED TO CRIMINAL FORUM

How to update Microsoft Edge

  • Open Microsoft Edge
  • Click on the three dots in the top-right corner
  • Select Help and feedback
  • Click About Microsoft Edge
  • Edge will automatically check for updates and install them if available
  • Click Restart to update Microsoft Edge and apply any updates

For mobile devices, updates can be done through the respective app stores (Google Play Store for Android and App Store for iOS) by searching for Edge and tapping Update if available.

Microsoft Edge browser   (Kurt “CyberGuy” Knutsson)

How to update Safari

  • On a Mac, open the Apple menu
  • Select System Settings 
  • Tap General 
  • Click Software Update 
  • If an update for Safari is available, click Update Now.
  • Follow the prompts to complete the installation.

For iOS devices, updates are done through the Settings app under General > Software Update.

Safari browser   (Kurt “CyberGuy” Knutsson)

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How to update Mozilla Firefox

  • Open Firefox
  • Click on the three horizontal lines (☰) in the top-right corner
  • Select Help 
  • Click About Firefox
  • Firefox will check for updates and download them automatically
  • Click Restart to Update Firefox if an update was installed

For mobile devices, you can update Firefox through the Google Play Store (Android) or App Store (iOS) by searching for Firefox and tapping Update if available.

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Mozilla Firebox browser   (Kurt “CyberGuy” Knutsson)

Additional measures to keep your data and devices safe

Below are some extra steps to take to prevent being affected by hackers exploiting security vulnerabilities.

1. Have strong antivirus software: Hackers often gain access to devices by sending infected emails or documents or tricking you into clicking a link that downloads malware. You can avoid all of this by installing strong antivirus software that will detect any potential threat before it can take over your device or router.

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The best way to safeguard yourself from malicious links that install malware, potentially accessing your private information, is to have strong antivirus software installed on all your devices. This protection can also alert you to phishing emails and ransomware scams, keeping your personal information and digital assets safe. Get my picks for the best 2024 antivirus protection winners for your Windows, Mac, Android and iOS devices.

2. Recognize urgent requests as potential scams: Always be wary if someone is urgently requesting you to do something like send money, provide personal information or click on a lin. Chances are it’s a scam.

3. Use strong and unique passwords: Create strong passwords for your accounts and devices and avoid using the same password for multiple online accounts. Consider using a password manager to securely store and generate complex passwords. It will help you to create unique and difficult-to-crack passwords that a hacker could never guess. Second, it also keeps track of all your passwords in one place and fills passwords in for you when you’re logging into an account so that you never have to remember them yourself.  The fewer passwords you remember, the less likely you will be to reuse them for your accounts. Get more details about my best expert-reviewed Password Managers of 2024 here.

4. Enable two-factor authentication: Enable two-factor authentication whenever possible. This adds an extra layer of security by requiring a second form of verification, such as a code sent to your phone, in addition to your password.

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Kurt’s key takeaway

Given the newly discovered 0.0.0.0 Day vulnerability, it’s more important than ever to keep your browser up to date. While major browser companies are actively working on a fix, staying on top of software updates is crucial to protect your device. To further safeguard your online experience, be cautious of suspicious links, practice safe browsing habits, and regularly check for updates.

Given the recent discovery of the 0.0.0.0 Day vulnerability affecting major browsers like Google Chrome, Firefox, Safari and Edge, which has been present for 18 years, do you think tech companies are doing enough to ensure the security of their products and protect users from such long-standing vulnerabilities? Let us know by writing us at Cyberguy.com/Contact

For more of my tech tips and security alerts, subscribe to my free CyberGuy Report Newsletter by heading to Cyberguy.com/Newsletter

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Copyright 2024 CyberGuy.com.  All rights reserved.

Technology

Here’s your first look at Kratos in Amazon’s God of War show

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Here’s your first look at Kratos in Amazon’s God of War show

Amazon has slowly been teasing out casting details for its live-action adaptation of God of War, and now we have our first look at the show. It’s a single image but a notable one showing protagonist Kratos and his son Atreus. The characters are played by Ryan Hurst and Callum Vinson, respectively, and they look relatively close to their video game counterparts.

There aren’t a lot of other details about the show just yet, but this is Amazon’s official description:

The God of War series storyline follows father and son Kratos and Atreus as they embark on a journey to spread the ashes of their wife and mother, Faye. Through their adventures, Kratos tries to teach his son to be a better god, while Atreus tries to teach his father how to be a better human.

That sounds a lot like the recent soft reboot of the franchise, which started with 2018’s God of War and continued through Ragnarök in 2022. For the Amazon series, Ronald D. Moore, best-known for his work on For All Mankind and Battlestar Galactica, will serve as showrunner. The rest of the cast includes: Mandy Patinkin (Odin), Ed Skrein (Baldur), Max Parker (Heimdall), Ólafur Darri Ólafsson (Thor), Teresa Palmer (Sif), Alastair Duncan (Mimir), Jeff Gulka (Sindri), and Danny Woodburn (Brok).

While production is underway on the God of War series, there’s no word on when it might start streaming.

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300,000 Chrome users hit by fake AI extensions

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300,000 Chrome users hit by fake AI extensions

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Your web browser may feel like a safe place, especially when you install helpful tools that promise to make your life easier. But security researchers have uncovered a dangerous campaign in which more than 300,000 people installed Chrome extensions pretending to be artificial intelligence (AI) assistants. Instead of helping, these fake tools secretly collect sensitive information like your emails, passwords and browsing activity.

They used familiar names like ChatGPT, Gemini and AI Assistant. If you use Chrome and have installed any AI-related extension, your personal information may already be exposed. Even worse, some of these malicious extensions are still available today, putting more people at risk without their knowing.

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More than 300,000 Chrome users installed fake AI extensions that secretly harvested sensitive data. (Kurt “CyberGuy” Knutsson)

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What you need to know about fake AI extensions

Security researchers at browser security company LayerX discovered a large campaign involving 30 malicious Chrome extensions disguised as AI-powered assistants (via BleepingComputer). Together, these extensions were installed more than 300,000 times by unsuspecting users.

Some of the most popular extensions included names like AI Sidebar with 70,000 users, AI Assistant with 60,000 users, ChatGPT Translate with 30,000 users, and Google Gemini with 10,000 users. Another extension called Gemini AI Sidebar had 80,000 users before it was removed.

These extensions were distributed through the official Chrome Web Store, which made them appear legitimate and trustworthy. Even more concerning, researchers found that many of these extensions were connected to the same malicious server, showing they were part of a coordinated effort.

While some extensions have since been removed, others remain available. This means new users could still unknowingly install them and expose their personal data. Here’s the list of the affected extensions:

  • AI Assistant
  • Llama
  • Gemini AI Sidebar
  • AI Sidebar
  • ChatGPT Sidebar
  • Grok
  • Asking ChatGPT
  • ChatGBT
  • Chat Bot GPT
  • Grok Chatbot
  • Chat With Gemini
  • XAI
  • Google Gemini
  • Ask Gemini
  • AI Letter Generator
  • AI Message Generator
  • AI Translator
  • AI For Translation
  • AI Cover Letter Generator
  • AI Image Generator ChatGPT
  • Ai Wallpaper Generator
  • Ai Picture Generator
  • DeepSeek Download
  • AI Email Writer
  • Email Generator AI
  • DeepSeek Chat
  • ChatGPT Picture Generator
  • ChatGPT Translate
  • AI GPT
  • ChatGPT Translation
  • ChatGPT for Gmail

FAKE AI CHAT RESULTS ARE SPREADING DANGEROUS MAC MALWARE

These malicious tools were listed in the official Chrome Web Store, making them appear legitimate and trustworthy. (LayerX)

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How the fake AI Chrome extension attack works

These fake extensions pretend to offer helpful AI features, such as translating text, summarizing emails, or acting as an AI assistant. But behind the scenes, they quietly monitor what you are doing online.

Once installed, the extension gains permission to view and interact with the websites you visit. This allows it to read the contents of web pages, including login screens where you enter your username and password.

In some cases, the extensions specifically targeted Gmail. They could read your email messages directly from your browser, including emails you received and even drafts you were still writing. This means attackers could access private conversations, financial information and sensitive personal details.

The extensions then sent this information to servers controlled by the attackers. Because they loaded content remotely, the attackers could change their behavior at any time without needing to update the extension.

Some versions could also activate voice features through your browser. This could potentially capture spoken conversations near your device and send transcripts back to the attackers.

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If you installed one of these extensions, attackers may already have access to extremely sensitive information. This includes your email content, login credentials, browsing habits and possibly even voice recordings.

We reached out to Google for comment, and a spokesperson told CyberGuy that the company “can confirm that the extensions from this report have all been removed from the Google Web Store.”

BROWSER EXTENSION MALWARE INFECTED 8.8M USERS IN DARKSPECTRE ATTACK

Once installed, the extensions could read emails, capture passwords, monitor browsing activity and send the data to attacker-controlled servers. (Bildquelle/ullstein bild via Getty Images)

7 ways you can protect yourself from malicious Chrome extensions

If you have ever installed an AI-related Chrome extension, taking a few simple precautions now can help protect your accounts and prevent further damage.

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1) Remove any suspicious or unused browser extensions

On a Windows PC or Mac, open Chrome and type chrome://extensions into the address bar. Review every extension listed. If you see anything unfamiliar, especially AI assistants you don’t remember installing, click “Remove” immediately. Malicious extensions depend on going unnoticed. Removing them stops further data collection and cuts off the attacker’s access to your information.

2) Change your passwords

If you installed any suspicious extension, assume your passwords may be compromised. Start by changing your email password first, since email controls access to most other accounts. Then update passwords for banking, shopping and social media accounts. This prevents attackers from using stolen credentials to break into your accounts.

3) Use a password manager to create and protect strong passwords

A password manager generates unique, complex passwords for each account and stores them securely. This prevents attackers from accessing multiple accounts if one password is stolen. Password managers also alert you if your login credentials appear in known data breaches, helping you respond quickly and protect your identity. Check out the best expert-reviewed password managers of 2026 at Cyberguy.com.

4) Install strong antivirus software and keep it active

Good antivirus software can detect malicious browser extensions, spyware, and other hidden threats. It scans your system for suspicious activity and blocks harmful programs before they can steal your information. This adds an important layer of protection that works continuously in the background to keep your device safe. Get my picks for the best 2026 antivirus protection winners for your Windows, Mac, Android & iOS devices at Cyberguy.com.

5) Use an identity theft protection service

Identity theft protection services monitor your personal data, including email addresses, financial accounts, and Social Security numbers, for signs of misuse. If criminals try to open accounts or commit fraud using your information, you receive alerts quickly. Early detection allows you to act fast and limit financial and personal damage. See my tips and best picks on how to protect yourself from identity theft at Cyberguy.com.

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6) Keep your browser and computer fully updated

Software updates fix security vulnerabilities that attackers exploit. Enable automatic updates for Chrome and your operating system so you always have the latest protections. These updates strengthen your defenses against malicious extensions and prevent attackers from taking advantage of known weaknesses.

7) Use a personal data removal service

Personal data removal services scan data broker websites that collect and sell your personal information. They help remove your data from these sites, reducing what attackers can find and use against you. Less exposed information means fewer opportunities for criminals to target you with scams, identity theft or phishing attacks.

Check out my top picks for data removal services and get a free scan to find out if your personal information is already out on the web by visiting Cyberguy.com.

Get a free scan to find out if your personal information is already out on the web: Cyberguy.com.

Kurt’s key takeaway

Even tools designed to make your life easier can become tools for cybercriminals. Malicious extensions often hide behind trusted names and convincing features, making them difficult to spot. You can significantly reduce your risk by reviewing your browser extensions regularly, removing anything suspicious and using protective tools like password managers and strong antivirus software.

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Have you checked your browser extensions recently? Let us know your thoughts by writing to us at Cyberguy.com.

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Anthropic refuses Pentagon’s new terms, standing firm on lethal autonomous weapons and mass surveillance

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Anthropic refuses Pentagon’s new terms, standing firm on lethal autonomous weapons and mass surveillance

Less than 24 hours before the deadline in an ultimatum issued by the Pentagon, Anthropic has refused the Department of Defense’s demands for unrestricted access to its AI.

It’s the culmination of a dramatic exchange of public statements, social media posts, and behind-the-scenes negotiations, coming down to Defense Secretary Pete Hegseth’s desire to renegotiate all AI labs’ current contracts with the military. But Anthropic, so far, has refused to back down from its two current red lines: no mass surveillance of Americans, and no lethal autonomous weapons (or weapons with license to kill targets with no human oversight whatsoever). OpenAI and xAI had reportedly already agreed to the new terms, while Anthropic’s refusal had led to CEO Dario Amodei being summoned to the White House this week for a meeting with Hegseth himself, in which the Secretary reportedly issued an ultimatum to the CEO to back down by the end of business day on Friday or else.

In a statement late Thursday, Amodei wrote, “I believe deeply in the existential importance of using AI to defend the United States and other democracies, and to defeat our autocratic adversaries. Anthropic has therefore worked proactively to deploy our models to the Department of War and the intelligence community.”

He added that the company has “never raised objections to particular military operations nor attempted to limit use of our technology in an ad hoc manner” but that in a “narrow set of cases, we believe AI can undermine, rather than defend, democratic values” — going on to specifically mention mass domestic surveillance and fully autonomous weapons. (Amodei mentioned that “partial autonomous weapons … are vital to the defense of democracy” and that fully autonomous weapons may eventually “prove critical for our national defense,” but that “today, frontier AI systems are simply not reliable enough to power fully autonomous weapons.” He did not rule out Anthropic acquiescing to the military’s use of fully autonomous weapons in the future but mentioned that they were not ready now.)

The Pentagon had already reportedly asked major defense contractors to assess their dependence on Anthropic’s Claude, which could be seen as the first step to designating the company a “supply chain risk” – a public threat that the Pentagon had made recently (and a classification usually reserved for threats to national security). The Pentagon was also reportedly considering invoking the Defense Production Act to make Anthropic comply.

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Amodei wrote in his statement that the Pentagon’s “threats do not change our position: we cannot in good conscience accede to their request.” He also wrote that “should the Department choose to offboard Anthropic, we will work to enable a smooth transition to another provider, avoiding any disruption to ongoing military planning, operations, or other critical missions. Our models will be available on the expansive terms we have proposed for as long as required.”

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