Vulnerability identifier: #VU137

Vulnerability risk: High

CVSSv3.1: 8.3 [CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2016-3284

CWE-ID: CWE-119

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Microsoft Office
Client/Desktop applications / Office applications
Microsoft Office for Mac
Client/Desktop applications / Office applications
Microsoft Office Compatibility Pack
Client/Desktop applications / Office applications
Microsoft Excel
Client/Desktop applications / Office applications
Microsoft Excel for Mac
Client/Desktop applications / Office applications

Vendor: Microsoft

Description

A remote attacker can execute arbitrary code on the target system.

The vulnerability exists due to an unknown error in Microsoft Excel. A remote attacker can execute arbitrary code on the target system.

Successful exploitation of this vulnerability will allow a remote attacker to execute arbitrary commands, access files and perform any actions with privileges of the current user.

Mitigation

To resolve this vulnerability vendor recommends installing the following updates:

Microsoft Office 2007

Microsoft Excel 2007 Service Pack 3

Microsoft Office 2010

Microsoft Excel 2010 Service Pack 2 (32-bit editions)
Microsoft Excel 2010 Service Pack 2 (64-bit editions)

Microsoft Office 2013

Microsoft Excel 2013 Service Pack 1 (32-bit editions)
Microsoft Excel 2013 Service Pack 1 (64-bit editions)

Microsoft Office 2013 RT

Use Windows Update to obtain the patch.

Microsoft Office 2016

Microsoft Excel 2016 (32-bit edition)
Microsoft Excel 2016 (64-bit edition)

Microsoft Office for Mac 2011

Microsoft Excel for Mac 2011

Microsoft Office 2016 for Mac

Microsoft Excel 2016 for Mac

Other Office Software

Microsoft Office Compatibility Pack Service Pack 3
Microsoft Excel Viewer

Vulnerable software versions

Microsoft Office: 2007, 2010, 2013 - 2013 RT

Microsoft Office for Mac: 2011 - 2016

Microsoft Office Compatibility Pack:

Microsoft Excel:

Microsoft Excel for Mac: 2011 - 2016

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External links
http://technet.microsoft.com/en-us/library/security/MS16-088

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.