Microsoft Internet Explorer 8/9 memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability classified as critical has been found in Microsoft Internet Explorer 8/9 (Web Browser). This affects an unknown functionality. The manipulation with an unknown input leads to a memory corruption vulnerability. CWE is classifying the issue as CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Microsoft Internet Explorer 8 and 9 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing an object that (1) was not properly initialized or (2) is deleted, aka "Layout Memory Corruption Vulnerability."

The weakness was released 06/16/2011 as MS11-050 as confirmed bulletin (Technet). The advisory is shared at This vulnerability is uniquely identified as CVE-2011-1260. It is possible to initiate the attack remotely. No form of authentication is needed for 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. We expect the 0-day to have been worth approximately $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 55130 , 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 100103 (Microsoft Internet Explorer Cumulative Security Update (MS11-050)).

Applying the patch MS11-050 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 11272.

The vulnerability is also documented in the vulnerability database at Tenable (55130).








  • end of life

CPE 2.3info

CPE 2.2info


VulDB CVSS-B Score: 🔍
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VulDB Reliability: 🔍


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: 🔍
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Class: Memory corruption
CWE: CWE-119

Local: No
Remote: Yes

Availability: 🔍
Status: Highly functional
Download: 🔍

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Price Prediction: 🔍
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Nessus ID: 55130
Nessus File: 🔍
Nessus Risk: 🔍

OpenVAS ID: 902443
OpenVAS Name: Microsoft Internet Explorer Multiple Vulnerabilities (2530548)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Saint ID: exploit_info/ie_layoutgridchar
Saint Name: Microsoft Internet Explorer layout-grid-char Style Property Use-After-Free Memory Corruption

Qualys ID: 🔍
Qualys Name: 🔍

MetaSploit ID: ms11_050_mshtml_cobjectelement.rb
MetaSploit Name: MS11-050 IE mshtml!CObjectElement Use After Free
MetaSploit File: 🔍

Exploit-DB: 🔍

Threat Intelligenceinfo

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


Recommended: Patch
Status: 🔍

0-Day Time: 🔍

Patch: MS11-050
TippingPoint: 🔍
ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍
Fortigate IPS: 🔍


03/04/2011 🔍
06/14/2011 +102 days 🔍
06/15/2011 +1 days 🔍
06/16/2011 +1 days 🔍
06/16/2011 +0 days 🔍
03/23/2015 +1376 days 🔍
11/08/2021 +2422 days 🔍



Advisory: MS11-050
Status: Confirmed

CVE: CVE-2011-1260 (🔍)

Vulnerability Center: 31798 - [MS11-050] Microsoft Internet Explorer 8 and 9 Remote Use After Free Vulnerability, Medium
SecurityFocus: 48208


Created: 03/23/2015 04:50 PM
Updated: 11/08/2021 10:37 PM
Changes: 03/23/2015 04:50 PM (43), 04/07/2017 12:10 PM (29), 11/08/2021 10:17 PM (1), 11/08/2021 10:27 PM (7), 11/08/2021 10:37 PM (2)
Complete: 🔍
Cache ID: 100:2AA:40


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