CVE-2014-1776 - Vulnerability in Internet Explorer Could Allow Remote Code Execution

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Vulnerability name/brief description CVE-2014-1776 - Vulnerability in Internet Explorer Could Allow Remote Code Execution
CVE/CAN name
Vendor threat level Critical
SophosLabs threat level Critical
Solution MS14-021
Vendor description The vulnerability is a remote code execution vulnerability. The vulnerability exists in the way that Internet Explorer accesses an object in memory that has been deleted or has not been properly allocated. The vulnerability may corrupt memory in a way that could allow an attacker to execute arbitrary code in the context of the current user within Internet Explorer. An attacker could host a specially crafted website that is designed to exploit this vulnerability through Internet Explorer and then convince a user to view the website.
SophosLabs comments Successfully exploiting this vulnerability will give the attacker the same right and privileges as the current user. This vulnerability can be mitigated by restricting Internet Explorer from running Active Scripts or ActiveX controls. However, this will prevent some sites from rendering correctly.
Users can also unregister vgx.dll using the command line:
"%SystemRoot%\System32\regsvr32.exe" -u "%CommonProgramFiles%\Microsoft Shared\VGX\vgx.dll"
SophosLabs testing result No SophosLabs testing result found
Currently known exploits
First sample seen No samples found
Discovery date 28 Apr 2014
Affected software Internet Explorer 6
Internet Explorer 7
Internet Explorer 8
Internet Explorer 9
Internet Explorer 10
Internet Explorer 11
  • MAPP
  • April 28, 2014 - Initial Revision Written
  • April 28, 2014 - Added mitigation strategy
  • May 1, 2014 - Added patch reference

Explanation of terms

Vulnerability Name/Brief Description:

Vendor identifier plus a brief description of the type of attack.


Currently assigned CVE name. If a CVE name doesn't exist the CAN name will be used until a CVE has been assigned.

Vendor Threat Level:

Threat level assigned by the vendor

SophosLabs Threat Level:

Threat level assigned by SophosLabs

  • LOW RISK - There is little chance of this vulnerability being actively exploited by malware.
  • MEDIUM RISK - There is a possibility of this vulnerability being actively exploited by malware.
  • HIGH RISK - There is a strong possibility of this vulnerability being actively exploited by malware.
  • CRITICAL RISK - This vulnerability will almost certainly be actively exploited by malware.


Vendor-supplied Patch identifier and recommended solution, or workaround if applicable.

Vendor Description:

Summary of the cause and potential effect of the vulnerability provided by the vendor.

SophosLabs Comments:

SophosLabs' opinions and observations of the vulnerability in question.

SophosLabs Testing Result:

Details of completed lab testing, if applicable. Please note that the lab test environment may differ significantly from user environments.

Currently Known Exploits:

List of identities for known exploits, if applicable.

First Sample Seen:

Date of the first sample seen by SophosLabs.

Discovery Date:

Date of the earliest known publically disclosed advisory.

Affected Software:

Vulnerable platforms and software versions.