Exploit:W32/cve-2013-1331.a, Exploit:W32/cve-2013-1331, cve-2013-1331


The detection Exploit:W32/CVE-2013-1331 identifies files designed to target a known vulnerability in certain versions of the Microsoft Office program.

Automatic action

Based on the settings of your F-Secure security product, it will either move the file to the quarantine where it cannot spread or cause harm, or remove it.

Exploit Prevention

The vulnerabilities leveraged by exploits are usually application or platform specific; in other words, a specific program (or even a specific version of a particular program) must be installed on the machine in order for the exploit to be effective.

To prevent exploitation of such vulnerabilities, please refer to the application vendor for the latest updates and additional advice.

Suspect a file is incorrectly detected (a False Positive)?

A False Positive is when a file is incorrectly detected as harmful, usually because its code or behavior resembles known harmful programs. A False Positive will usually be fixed in a subsequent database update without any action needed on your part. If you wish, you may also:

  • Check for the latest database updates

    First check if your F-Secure security program is using the latest detection database updates, then try scanning the file again.

  • Submit a sample

    After checking, if you still believe the file is incorrectly detected, you can submit a sample of it for re-analysis.

    NOTE If the file was moved to quarantine, you need to collect the file from quarantine before you can submit it.

  • Exclude a file from further scanning

    If you are certain that the file is safe and want to continue using it, you can exclude it from further scanning by the F-Secure security product.

    Note You need administrative rights to change the settings.

For more Support

Knowledge Base

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User Guide

See the user guide for your product on the Help Center.

Contact Support

Chat with or call an expert for help.

Submit a sample

Submit a file or URL for further analysis.

Technical Details

The CVE-2013-1331 vulnerability in Microsoft Office 2003 and Microsoft Office for Mac 2011 involves improper parsing of PNG code. There have been reports of this vulnerability being used in limited, targeted attacks in the wild. The attacks use specially crafted Office documents, which reference malicious PNG files hosted on remote servers. If successfully exploited, the attacker may be able to perform remote code execution on the affected machine.

For more information on the CVE-2013-1331 vulnerability and the corresponding security update for it, please refer to: