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Vulnerability record · CVE-2009-0901 · published 29 July 2009

CVE-2009-0901: Microsoft visual c\+\+ code injection vulnerability

Microsoft · Visual C\+\+

The Active Template Library (ATL) in Microsoft Visual Studio .NET 2003 SP1, Visual Studio 2005 SP1 and 2008 Gold, and Visual C++ 2005 SP1 and 2008 Gold and SP1; and Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 Gold and SP2; does not prevent VariantClear calls on an uninitialized VARIANT, which allows remote attackers to execute arbitrary code via a malformed stream to an ATL (1) component or (2) control, related to ATL headers and error handling, aka "ATL Uninitialized Object Vulnerability."

8.8 CVSS 3.1 High EPSS 37% · top 1.6% CWE-94 · Code injectionCWE-457 · CWE-457
8.8CVSS 3.1 base score, v2 9.3
37%EPSS exploitation probability, 30 days
NoNot in CISA KEV
3Affected product versions listed by NVD
50References
16 Jun 2026Last modified by NVD

Description

The Active Template Library (ATL) in Microsoft Visual Studio .NET 2003 SP1, Visual Studio 2005 SP1 and 2008 Gold, and Visual C++ 2005 SP1 and 2008 Gold and SP1; and Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 Gold and SP2; does not prevent VariantClear calls on an uninitialized VARIANT, which allows remote attackers to execute arbitrary code via a malformed stream to an ATL (1) component or (2) control, related to ATL headers and error handling, aka "ATL Uninitialized Object Vulnerability."

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected products

3 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://blogs.technet.com/srd/archive/2009/08/11/ms09-037-why-we-are-using-cve-s-already-used-in-ms09-035.aspx
http://marc.info/?l=bugtraq&m=126592505426855&w=2
http://secunia.com/advisories/35967
http://secunia.com/advisories/36187
http://secunia.com/advisories/36374
http://secunia.com/advisories/36746
http://sunsolve.sun.com/search/document.do?assetkey=1-66-266108-1
http://www.adobe.com/support/security/advisories/apsa09-04.html Patch
http://www.adobe.com/support/security/bulletins/apsb09-10.html
http://www.adobe.com/support/security/bulletins/apsb09-11.html Patch
http://www.adobe.com/support/security/bulletins/apsb09-13.html
http://www.novell.com/support/viewContent.do?externalId=7004997&sliceId=1
http://www.securityfocus.com/bid/35832 Patch
http://www.us-cert.gov/cas/techalerts/TA09-195A.html US Government Resource
http://www.us-cert.gov/cas/techalerts/TA09-223A.html US Government Resource
http://www.us-cert.gov/cas/techalerts/TA09-286A.html US Government Resource
http://www.vupen.com/english/advisories/2009/2034
http://www.vupen.com/english/advisories/2009/2232
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-035
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-037
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-060
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6289
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6311
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6373
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7581
http://blogs.technet.com/srd/archive/2009/08/11/ms09-037-why-we-are-using-cve-s-already-used-in-ms09-035.aspx
http://marc.info/?l=bugtraq&m=126592505426855&w=2
http://secunia.com/advisories/35967
http://secunia.com/advisories/36187
http://secunia.com/advisories/36374
http://secunia.com/advisories/36746
http://sunsolve.sun.com/search/document.do?assetkey=1-66-266108-1
http://www.adobe.com/support/security/advisories/apsa09-04.html Patch
http://www.adobe.com/support/security/bulletins/apsb09-10.html
http://www.adobe.com/support/security/bulletins/apsb09-11.html Patch
http://www.adobe.com/support/security/bulletins/apsb09-13.html
http://www.novell.com/support/viewContent.do?externalId=7004997&sliceId=1
http://www.securityfocus.com/bid/35832 Patch
http://www.us-cert.gov/cas/techalerts/TA09-195A.html US Government Resource
http://www.us-cert.gov/cas/techalerts/TA09-223A.html US Government Resource

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2009-0901), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.