Microsoft security software detects and removes this threat.

HTML/Fiexp is a family of HTML pages containing JavaScript components belonging to an exploit kit called Fiesta. Similar to other exploit kits like Blacole, it first checks your browser, version, and installed plugins. It does this to determine what exploit to use on your PC. It can exploit vulnerabilities in Java, Adobe Flash Player, Adobe Acrobat Reader, Microsoft Silverlight, and Internet Explorer.

This threat might get into your PC if you visit a hacked or malicious website.

Find out ways that malware can get on your PC.  

What to do now

The following free Microsoft software detects and removes this threat:

Even if we've already detected and removed this particular threat, running a full scan might find other malware that is hiding on your PC.

You can also visit the Microsoft virus and malware community or our advanced troubleshooting page for more help.

If you’re using Windows XP, see our Windows XP end of support page.

Update Java, Adobe Acrobat and Reader, and Adobe Flash Player

Make sure you install all available updates. You can read more about these vulnerabilities and download software updates from these links:

You should remove older versions of Java, as keeping old and unsupported versions of Java on your PC is a serious security risk:

If you continue to get alerted about this threat, deleting your temporary Java files can help:

It's also important to keep your other software up to date:

Threat behavior

More information about this threat is available in the HTML/Fiexp family description.


Alerts from your security software may be the only symptom.


Alert level: Severe
First detected by definition:
Latest detected by definition: and higher
First detected on: Mar 19, 2014
This entry was first published on: Apr 11, 2014
This entry was updated on: Apr 11, 2014

This threat is also detected as:
No known aliases