CVE-2009-1136

EXPLOITED IN THE WILD

Microsoft Office Web Components Spreadsheet ActiveX Control - Remote Code Execution via msDataSourceObject Method

Title source: llm
STIX 2.1

Exploitation Summary

CVE-2009-1136 has been observed exploited in the wild (reported by VulnCheck KEV, InTheWild.io). EIP tracks 3 public exploits from researchers including Metasploit, anonymous, unknown, hdm, Ahmed Obied, including a Metasploit module exploits/windows/browser/ms09_043_owc_msdso.

AI-analyzed exploit summary This exploit targets a memory corruption vulnerability in Microsoft Office Web Components (OWC) Spreadsheet ActiveX controls (versions 10 and 11). It leverages JavaScript to trigger the vulnerability via heap spraying and ActiveX manipulation, leading to remote code execution.

Description

The Microsoft Office Web Components Spreadsheet ActiveX control (aka OWC10 or OWC11), as distributed in Office XP SP3 and Office 2003 SP3, Office XP Web Components SP3, Office 2003 Web Components SP3, Office 2003 Web Components SP1 for the 2007 Microsoft Office System, Internet Security and Acceleration (ISA) Server 2004 SP3 and 2006 Gold and SP1, and Office Small Business Accounting 2006, when used in Internet Explorer, allows remote attackers to execute arbitrary code via a crafted call to the msDataSourceObject method, as exploited in the wild in July and August 2009, aka "Office Web Components HTML Script Vulnerability."

Exploits (3)

exploitdb WORKING POC VERIFIED
by Metasploit · rubyremotewindows
https://www.exploit-db.com/exploits/16537

This exploit targets a memory corruption vulnerability in Microsoft Office Web Components (OWC) Spreadsheet ActiveX controls (versions 10 and 11). It leverages JavaScript to trigger the vulnerability via heap spraying and ActiveX manipulation, leading to remote code execution.

Classification
Working Poc 95%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Office Web Components (OWC) Spreadsheet ActiveX (OWC10.Spreadsheet, OWC11.Spreadsheet)
No auth needed
Prerequisites: Target must have vulnerable OWC ActiveX control installed · Target must visit a malicious webpage or be redirected to it
devstral-2 · analyzed Feb 16, 2026 Full analysis →
exploitdb WORKING POC VERIFIED
by anonymous · textdoswindows
https://www.exploit-db.com/exploits/9163

This exploit targets a vulnerability in the OWC10.Spreadsheet ActiveX control (CVE-2009-1136) by triggering a heap overflow via crafted JavaScript. The shellcode is executed through memory corruption, leading to arbitrary code execution.

Classification
Working Poc 90%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Office Web Components (OWC10.Spreadsheet)
No auth needed
Prerequisites: Victim must visit a malicious webpage · OWC10.Spreadsheet ActiveX control must be installed and enabled
devstral-2 · analyzed Feb 16, 2026 Full analysis →
metasploit WORKING POC NORMAL
by unknown, hdm, Ahmed Obied · rubypocwin
https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/browser/ms09_043_owc_msdso.rb

This Metasploit module exploits a memory corruption vulnerability in Microsoft Office Web Components (OWC) Spreadsheet ActiveX controls (versions 10 and 11) via a crafted JavaScript payload. It leverages the msDataSourceObject method to trigger the vulnerability, leading to remote code execution.

Classification
Working Poc 100%
Attack Type
Rce
Complexity
Moderate
Reliability
Reliable
Target: Microsoft Office Web Components (OWC) Spreadsheet ActiveX (OWC10.Spreadsheet, OWC11.Spreadsheet)
No auth needed
Prerequisites: Victim must visit a malicious webpage or open a malicious HTML file · ActiveX controls must be enabled in the browser
devstral-2 · analyzed Feb 19, 2026 Full analysis →

Scores

EPSS 0.8608
EPSS Percentile 99.4%

Details

VulnCheck KEV 2009-07-15
InTheWild.io 2018-10-12
CWE
CWE-94
Status published
Products (6)
microsoft/isa_server 2004 sp3 (2 CPE variants)
microsoft/isa_server 2006 (3 CPE variants)
microsoft/office 2003 (2 CPE variants)
microsoft/office_web_components 2003 sp1 (2 CPE variants)
microsoft/office_web_components xp sp3
microsoft/office_xp sp3
Published Jul 15, 2009
Tracked Since Feb 18, 2026