Microsoft Internet Explorer 6/7/8 input validation

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability, which was classified as critical, has been found in Microsoft Internet Explorer 6/7/8 (Web Browser). This issue affects an unknown functionality. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is confidentiality, integrity, and availability.

The issue has been introduced in 03/05/2008. The weakness was disclosed 10/11/2011 as MS11-081 as confirmed bulletin (Technet). The advisory is shared at The identification of this vulnerability is CVE-2011-1996. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available.

It is declared as highly functional. The vulnerability was handled as a non-public zero-day exploit for at least 1315 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 56455 , which helps to determine the existence of the flaw in a target environment. The commercial vulnerability scanner Qualys is able to test this issue with plugin 100111 (Microsoft Internet Explorer Cumulative Security Update (MS11-081)).

Applying the patch MS11-081 is able to eliminate this problem. The bugfix is ready for download at Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 11759.

The vulnerability is also documented in the databases at X-Force (70130) and Tenable (56455). The entries 4423, 59002, 59001 and 59000 are pretty similar.








  • end of life

CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 6.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔍
VulDB Reliability: 🔍



VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍


Class: Input validation
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Highly functional

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍


Nessus ID: 56455
Nessus File: 🔍
Nessus Risk: 🔍

OpenVAS ID: 901208
OpenVAS Name: Microsoft Internet Explorer Multiple Vulnerabilities (2586448)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: ms11_081_option.rb
MetaSploit Name: MS11-081 Microsoft Internet Explorer Option Element Use-After-Free
MetaSploit File: 🔍

Threat Intelligenceinfo

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


Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: MS11-081
TippingPoint: 🔍
ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍
Fortigate IPS: 🔍


03/05/2008 🔍
05/09/2011 +1159 days 🔍
10/11/2011 +155 days 🔍
10/11/2011 +0 days 🔍
10/11/2011 +0 days 🔍
10/12/2011 +1 days 🔍
03/23/2015 +1258 days 🔍
11/23/2021 +2437 days 🔍



Advisory: MS11-081
Status: Confirmed

CVE: CVE-2011-1996 (🔍)

X-Force: 70130
Vulnerability Center: 33524 - [MS11-081] Microsoft Internet Explorer 6-8 Option Element Remote Code Execution Vulnerability, Medium
SecurityFocus: 49961

See also: 🔍


Created: 03/23/2015 04:50 PM
Updated: 11/23/2021 03:11 PM
Changes: 03/23/2015 04:50 PM (46), 04/07/2017 12:10 PM (26), 11/23/2021 03:01 PM (2), 11/23/2021 03:05 PM (7), 11/23/2021 03:11 PM (1)
Complete: 🔍


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