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Microsoft WMI Administrative Tools WBEMSingleView.ocx ActiveX control vulnerability

Vulnerability Note VU#725596

Original Release Date: 2010-12-22 | Last Revised: 2010-12-22


The ActiveX control, WBEMSingleView.ocx, that is a part of the WMI Administrative Tools package contains a vulnerability.


The AddContextRef() and ReleaseContext() functions of the WMI Object Viewer control can be passed an object pointer from an attacker that results in arbitrary code execution. An Internet Explorer user with WBEMSingleView.ocx installed can be exploited by visiting a malicious web page.


An attacker can execute arbitrary code as the user.


We are currently unaware of a practical solution to this problem.

Disable the WMI Object Viewer ActiveX control in Internet Explorer

The vulnerable ActiveX control can be disabled in Internet Explorer by setting the kill bit for the following CLSID:


More information about how to set the kill bit is available in Microsoft Support Document 240797. Alternatively, the following text can be saved as a .REG file and imported to set the kill bit for this control:

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\ActiveX Compatibility\{2745E5F5-D234-11D0-847A-00C04FD7BB08}]
"Compatibility Flags"=dword:00000400

[HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Microsoft\Internet Explorer\ActiveX Compatibility\{2745E5F5-D234-11D0-847A-00C04FD7BB08}]
"Compatibility Flags"=dword:00000400

Disable ActiveX

Disabling ActiveX controls in the Internet Zone (or any zone used by an attacker) appears to prevent exploitation of this and other ActiveX vulnerabilities. Instructions for disabling ActiveX in the Internet Zone can be found in the "Securing Your Web Browser" document.

Vendor Information


Microsoft Corporation Affected

Updated:  December 22, 2010



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

We are not aware of further vendor information regarding this vulnerability.

Vendor References

CVSS Metrics

Group Score Vector



This vulnerability was publicly disclosed on

This document was written by Jared Allar.

Other Information

CVE IDs: None
Severity Metric: 3.94
Date Public: 2010-12-22
Date First Published: 2010-12-22
Date Last Updated: 2010-12-22 16:42 UTC
Document Revision: 14

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