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Microsoft Security Intelligence
Published Mar 06, 2014 | Updated Sep 15, 2017

Exploit:HTML/Fiexp.A

Detected by Microsoft Defender Antivirus

Aliases: JS/Crypted.EY! (Command) Mal/ExpJS-S (Sophos) Fiesta exploit kit (other)

Summary

Windows Defender detects and removes this threat.

This threat can infect your PC if it is running vulnerable software, including:

  • Adobe Flash Player version 10 update 3 and earlier, and version 11 update 5 and earlier.
  • Silverlight version 5 and earlier.

If your PC has vulnerable software this threat can download other malware, including Win32/Miuref.

You might get an alert about this threat even if you're not using a vulnerable software. This is because we detect when a website tries to use the vulnerability, even if it isn't successful.

The following freeĀ 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 for more help.

Update Java

Make sure you install all available Java updates.

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:

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