What it is
CVE-2009-1136 is an unauthenticated vulnerability affecting Microsoft Office Web Components. The Microsoft Office Web Components Spreadsheet ActiveX control (aka OWC10 or OWC11), as distributed in Office XP SP3 and...
Vulnerability report
Exploited in the wild
High confidence
Not in CISA KEV
CVE-2009-1136
Office Web Components
Microsoft / Office Web Components
- Severity
- CVSS 9.3 · High
- Confidence
- High
- Exploit status
- Exploited in the wild
- EPSS
- 62.0%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is high.
Who is affected?
Microsoft / Office Web Components.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
Office Web Components
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."
- Published
- 15 Jul 2009
- Exploitation Reported
- 15 Jul 2009
- Attack vector
- Remote
- Complexity
- —
- Privileges
- None
- User interaction
- —
Tags
metasploit
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2009-1136
- MS09-043 docs.microsoft.com · Vendor Advisory https://docs.microsoft.com/en-us/security-updates/securitybulletins/2...
- TA09-223A us-cert.gov · Third-Party Advisory http://www.us-cert.gov/cas/techalerts/TA09-223A.html
- oval:org.mitre.oval:def:5809 oval.cisecurity.org · VDB Entry https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.m...
- isc.sans.org/diary.html isc.sans.org · CVE Record http://isc.sans.org/diary.html?storyid=6778
- microsoft.com/technet/security/advisory/973472.mspx microsoft.com · CVE Record http://www.microsoft.com/technet/security/advisory/973472.mspx
- blogs.technet.com/srd/archive/2009/07/13/more-information-abou... blogs.technet.com · CVE Record http://blogs.technet.com/srd/archive/2009/07/13/more-information-abou...
- blogs.technet.com/msrc/archive/2009/07/13/microsoft-security-a... blogs.technet.com · CVE Record http://blogs.technet.com/msrc/archive/2009/07/13/microsoft-security-a...
- xeye.us/blog/2009/07/one-0day xeye.us · CVE Record http://xeye.us/blog/2009/07/one-0day/
- trac.metasploit.com/browser/framework3/trunk/modules/exploits/wi... trac.metasploit.com · CVE Record http://trac.metasploit.com/browser/framework3/trunk/modules/exploits/...
Exploitation evidence
Why KEV Intelligence marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
CVE
Independent exploitation attestation added to the KEV Intelligence record.
Proof of concept available
Public scanner or PoC coverage increases practical exploitability.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CVE First | 2009-07-15 15:00 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- 0
- User-Agents
- 0
Raw values available in Pro and Enterprise.
Scanner coverage
Metasploit template detected 28 Apr 2025.
View Metasploit template (opens in new tab)Virtual patch status
No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →Scanner Artifacts
Scanner and exploit-framework references linked to this CVE.
| Scanner | Reference | Detected |
|---|---|---|
| Metasploit | https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/browser/ms09_043_owc_msdso.rb | 28 Apr 2025 |
Risk and context
Severity, weaknesses, and research context
CVSS v2.0
9.3
High
AV:N/AC:M/Au:N/C:C/I:C/A:C
EPSS
62.0%
Potential Proof of Concepts
These PoCs are unverified and could contain malware. Use at your own risk.
Timeline
From disclosure to observed exploitation
-
Metasploit module available
Exploit module available
-
Public PoC available
Public proof-of-concept code published
-
Added to KEV Intelligence KEV Feed
High-confidence, third-party attested exploitation
-
CVE published
Vulnerability disclosed publicly
-
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2009-1136
Free JSON includes basic KEV fields{
"cve_id": "CVE-2009-1136",
"confidence": "High",
"cvss_score": 9.3,
"cvss_estimated": false,
"epss_score": 0.6202,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}Early warning alerts
Get alerts on high-impact exploitation
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