Which products and versions are affected by CVE-2009-1534?

Affected: Isa Server (Microsoft) versions 2004-sp3, 2006-sp1; Office (Microsoft) versions 2003-sp3, xp-sp3; Office Web Components (Microsoft) versions 2000-sp3, 2003-sp1, 2003-sp3, xp-sp3. The full list is in the CVE brief.

Is CVE-2009-1534 being exploited in the wild?

It is not listed in any known-exploited vulnerabilities catalog.

Is CVE-2009-1534 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-2009-1534?

Public exploit code is available.

Is there a fix for CVE-2009-1534?

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

How urgently should CVE-2009-1534 be patched?

Brandefense priority: patch immediately, because it is very likely to be exploited soon.

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Vulnerability Intelligence

CVE-2009-1534

CriticalPublic exploit

Buffer overflow in the Office Web Components ActiveX Control in Microsoft Office XP SP3, Office 2000 Web Components SP3, Office XP Web Components SP3, BizTalk Server 2002, and Visual Studio .NET 2003 SP1 allows remote attackers to execute arbitrary code via crafted property…

Published Aug 12, 2009 · Updated Apr 22, 2026

Key Facts

Patch immediately

CVE-2009-1534 is a critical-severity vulnerability (CVSS 9.3 v2) affecting Isa Server (Microsoft), Office (Microsoft), Office Web Components (Microsoft).
It is not listed in any known-exploited vulnerabilities catalog. Public exploit code is available.
EPSS estimates a 52% 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 very likely to be exploited soon.

CVSS v2

9.3

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

EPSS (30-day exploit likelihood)

52%

Higher than 98.9% of all scored CVEs

Exploited in the wild

No known

Not in a known-exploited catalog

Public exploit code

Available

Proof-of-concept or weaponized module

Get the full CVE-2009-1534 brief as a PDF

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

Description

Affected Products

11 affected entries in total

Product	Affected versions	Fixed in
Isa ServerMicrosoft	2004-sp3, 2006-sp1	n/a
OfficeMicrosoft	2003-sp3, xp-sp3	n/a
Office Web ComponentsMicrosoft	2000-sp3, 2003-sp1, 2003-sp3, xp-sp3	n/a

Timeline

Publicly disclosed
Aug 12, 2009
Last updated
Apr 22, 2026

Weakness Type

CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

3 more references in the full CVE brief

FAQ

Common Questions.

Buffer overflow in the Office Web Components ActiveX Control in Microsoft Office XP SP3, Office 2000 Web Components SP3, Office XP Web Components SP3, BizTalk Server 2002, and Visual Studio .NET 2003 SP1 allows remote attackers to execute arbitrary code via crafted property values, aka "Office Web Components Buffer Ov…
Affected: Isa Server (Microsoft) versions 2004-sp3, 2006-sp1; Office (Microsoft) versions 2003-sp3, xp-sp3; Office Web Components (Microsoft) versions 2000-sp3, 2003-sp1, 2003-sp3, xp-sp3. The full list is in the CVE brief.
It is not listed in any known-exploited vulnerabilities catalog.
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 very likely to be exploited soon.

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