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What is Malvertising Redirect 10, 20, 21, etc.?


What is a Malvertising Redirect code?

These are codes emitted from the antivirus software on a user's device. These codes indicate that the user experienced a malvertising attack during the course of routine web browsing, and the antivirus software was able to block the attack.

Some common codes you may see:

  • Malvertising Redirect 10
  • Malvertising Redirect 20 
  • Malvertising Redirect 21
  • Malvertising Redirect 22
  • Malvertising Redirect 17
  • Malvertising Redirect 23

What is malvertising?

Malvertising is a malicious attack that impacts legitimate websites when bad actors purchase and submit ads through advertising platforms that appear to be normal, but in fact, execute malicious activity when displayed on the website. The ultimate goal of malicious ads is to either inject malware on end user devices or obtain personal information through phishing pages.


Who are you?

In order to help us guide you to the information that will be most applicable to your situation, let us know a little bit about why you came to this page:

Website Visitor

I received a notification with one of the codes above from my antivirus software while browsing the internet.

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Website Administrator

One of our website visitors notified us that they received one of these codes while browsing our website.

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Website Visitor

If you are seeing these error codes, then it means your antivirus software has recognized and blocked malvertising while you were browsing. There is nothing further for you to worry about in this instance.

However, there are plenty of malvertising attacks that are capable of sneaking past antivirus software. If you notice this pop-up on a website you regularly visit, it's best to notify the website that they may have an issue. 

Solving the problem will help them provide better experiences to their users (you!) and ensure you don’t fall victim to one of the attacks that is capable of squeaking past antivirus software in the future.

We're happy to notify the website owners for you, and provide them helpful content about blocking malvertising from their side. Just fill out the form below and we'll provide them with all the necessary information to inform them of the attack:

Website Administrator

If a user received one of these notifications while browsing your website, it could just be the tip of the iceberg. Antivirus software is only able to detect and block a fraction of malvertising on the end user device. 

So if this is happening at all, it probably means you have a much larger problem that you aren’t aware of. Depending upon your level of knowledge around malvertising, we have quite a few resources that may help you learn how to approach the problem.

Educate Me

Visit our malvertising resource center for an extensive list of educational resources on the subject.

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Show Me Examples

Browse through our case studies to see how malvertising affected other companies, and how they solved the problem.

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Help Me Fix it

Just want to fix it now? Get a free trial of cleanAD (it’s as simple as installing a single line of javascript on your website).

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