CVE-2009-0901
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."
Key facts
- CVSS score
- 8.8 (v3.1)
- Severity
- HIGH
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H- Weakness (CWE)
- CWE-94
- EPSS score
- 36.6% (99th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2009-0898)
- Published
- July 29, 2009
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2009-0898 in the EU Vulnerability Database. Last updated in EUVD on May 27, 2026.
View on the EU Vulnerability DatabaseAffected products
- microsoft / visual c++
- microsoft / visual c++
- microsoft / visual c++
- microsoft / visual studio
- microsoft / visual studio
- microsoft / visual studio
- microsoft / visual studio
- microsoft / visual studio .net
References
- 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
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
Query CVEs from your AI assistant
The CVE/NVD Explorer brain answers CVE questions directly inside Claude, ChatGPT, or any MCP assistant — always up to date, no setup. Add it once and stop pasting advisories into chat.
Add the CVE brain