Which products and versions are affected by CVE-2009-1136?

Affected: Isa Server (Microsoft) versions 2004-sp3, 2006, 2006-sp1, 2006-supportability; Office (Microsoft) versions 2003, 2003-sp3; Office Web Components (Microsoft) versions 2003-sp1, 2003-sp3, xp-sp3, among others. The full list is in the CVE brief.

Is CVE-2009-1136 being exploited in the wild?

It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Jul 15, 2009.

Is CVE-2009-1136 in the CISA KEV catalog?

No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.

Is there a public exploit for CVE-2009-1136?

Public exploit code is available.

Is there a fix for CVE-2009-1136?

No fixed version is listed yet; check the vendor advisory for mitigations.

How urgently should CVE-2009-1136 be patched?

Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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Vulnerability Intelligence

CVE-2009-1136

CriticalExploitedPublic exploit

Published Jul 15, 2009 · Updated Apr 22, 2026

Key Facts

Patch immediately

CVE-2009-1136 is a critical-severity vulnerability (CVSS 9.3 v2) affecting Isa Server (Microsoft), Office (Microsoft), Office Web Components (Microsoft) and 1 more product.
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Jul 15, 2009. Public exploit code is available.
EPSS estimates a 62% probability of exploitation in the next 30 days.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

CVSS v2

9.3

AV:N/AC:M/Au:N/C:C/I:C/A:C

EPSS (30-day exploit likelihood)

62%

Higher than 99.1% of all scored CVEs

Exploited in the wild

Yes

2 catalog listings

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2009-1136 brief as a PDF

Every affected product and fixed release, exploitation status and a first 24 hours response checklist, emailed within minutes.

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."

Known-Exploited Catalog Listings

Catalog	Added	Remediation due	Ransomware use
Industry KEV feed	Jul 15, 2009	n/a	Not reported
CIRCL KEV	Jul 15, 2009	n/a	Not reported

Required action: Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.

Affected Products

11 affected entries in total

Product	Affected versions	Fixed in
Isa ServerMicrosoft	2004-sp3, 2006, 2006-sp1, 2006-supportability	n/a
OfficeMicrosoft	2003, 2003-sp3	n/a
Office Web ComponentsMicrosoft	2003-sp1, 2003-sp3, xp-sp3	n/a
Office XpMicrosoft	sp3	n/a

Timeline

Publicly disclosed
Jul 15, 2009
Added to Industry KEV feed
Jul 15, 2009
Added to CIRCL KEV
Jul 15, 2009
Last updated
Apr 22, 2026

Weakness Type

CWE-94 Improper Control of Generation of Code ('Code Injection')

References

advisoryhttp://www.microsoft.com/technet/security/advisory/973472.mspx
exploitMSF ms09_043_owc_msdso.rb
exploitVulnCheck exploitation report
exploitVulnCheck exploitation report
exploitExploitDB-16537

10 more references in the full CVE brief

FAQ

Common Questions.

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 2…
Affected: Isa Server (Microsoft) versions 2004-sp3, 2006, 2006-sp1, 2006-supportability; Office (Microsoft) versions 2003, 2003-sp3; Office Web Components (Microsoft) versions 2003-sp1, 2003-sp3, xp-sp3, among others. The full list is in the CVE brief.
It is exploited in the wild, listed in Industry KEV feed, CIRCL KEV since Jul 15, 2009.
No, it is not currently listed in the CISA Known Exploited Vulnerabilities catalog.
Public exploit code is available.
No fixed version is listed yet; check the vendor advisory for mitigations.
Brandefense priority: patch immediately, because it is listed as exploited in the wild.

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