Microsoft Internet Explorer 6.0 ActiveX Object Click denial of service

CVSS Meta Temp Score
CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.
Current Exploit Price (≈)
Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.
CTI Interest Score
Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.

A vulnerability classified as problematic was found in Microsoft Internet Explorer 6.0 (Web Browser). This vulnerability affects the function Click of the component ActiveX Object. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The program does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability.

The issue has been introduced in 08/27/2001. The weakness was presented 07/21/2006 (Website). The advisory is shared for download at This vulnerability was named CVE-2006-3898 since 07/26/2006. The exploitation appears to be easy. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details and also a public exploit are known. The MITRE ATT&CK project declares the attack technique as T1499.

After immediately, there has been an exploit disclosed. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 1789 days. During that time the estimated underground price was around $5k-$25k.

Upgrading to version 6.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at X-Force (27929). See 31529 and 31527 for similar entries.






  • commercial


  • end of life

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.6

VulDB Base Score: 5.3
VulDB Temp Score: 4.6
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍


Class: Denial of service
CWE: CWE-404
ATT&CK: T1499

Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍


Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍
Exploit Delay Time: 🔍

Upgrade: Internet Explorer 6.0


08/27/2001 🔍
07/21/2006 +1788 days 🔍
07/21/2006 +0 days 🔍
07/21/2006 +0 days 🔍
07/22/2006 +1 days 🔍
07/26/2006 +4 days 🔍
07/27/2006 +1 days 🔍
03/12/2015 +3150 days 🔍
04/07/2017 +757 days 🔍



Status: Not defined

CVE: CVE-2006-3898 (🔍)
X-Force: 27929 - Microsoft Internet Explorer Internet.HHCtrl ActiveX object denial of service
SecurityFocus: 19109 - Microsoft Internet Explorer Internet.HHCtrl Click Denial Of Service Vulnerability
OSVDB: 27231 - Microsoft IE HTML Help COM Object Click Method NULL Dereference
Vupen: ADV-2006-2952

scip Labs:
See also: 🔍


Created: 03/12/2015 02:25 PM
Updated: 04/07/2017 12:08 PM
Changes: 03/12/2015 02:25 PM (62), 04/07/2017 12:08 PM (6)
Complete: 🔍


No comments yet. Languages: en.

Please log in to comment.

Do you want to use VulDB in your project?

Use the official API to access entries easily!