{"id":"CVE-2009-0901","url":"https://www.cyber-defence.io/tools/cve/CVE-2009-0901","generatedAt":"2026-10-27T19:39:42.138Z","title":"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…","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.\"","published":"2009-07-29T17:30:01.000Z","lastModified":"2026-06-16T23:06:04.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-94","CWE-457"],"affected":["microsoft/visual c\\+\\+","microsoft/visual studio","microsoft/visual studio .net"],"epss":{"score":0.36608,"percentile":0.98487,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"urgent","text":"EPSS puts the probability of exploitation in the next 30 days at 36.6%, higher than 98% of all known CVEs. Patch or mitigate before the next change window."},"changes":[],"references":[{"url":"http://blogs.technet.com/srd/archive/2009/08/11/ms09-037-why-we-are-using-cve-s-already-used-in-ms09-035.aspx","source":"cve@mitre.org"},{"url":"http://marc.info/?l=bugtraq&m=126592505426855&w=2","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/35967","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/36187","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/36374","source":"cve@mitre.org"},{"url":"http://secunia.com/advisories/36746","source":"cve@mitre.org"},{"url":"http://sunsolve.sun.com/search/document.do?assetkey=1-66-266108-1","source":"cve@mitre.org"},{"url":"http://www.adobe.com/support/security/advisories/apsa09-04.html","tags":["Patch"],"source":"cve@mitre.org"},{"url":"http://www.adobe.com/support/security/bulletins/apsb09-10.html","source":"cve@mitre.org"},{"url":"http://www.adobe.com/support/security/bulletins/apsb09-11.html","tags":["Patch"],"source":"cve@mitre.org"},{"url":"http://www.adobe.com/support/security/bulletins/apsb09-13.html","source":"cve@mitre.org"},{"url":"http://www.novell.com/support/viewContent.do?externalId=7004997&sliceId=1","source":"cve@mitre.org"},{"url":"http://www.securityfocus.com/bid/35832","tags":["Patch"],"source":"cve@mitre.org"},{"url":"http://www.us-cert.gov/cas/techalerts/TA09-195A.html","tags":["US 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Resource"],"source":"cve@mitre.org"},{"url":"http://www.vupen.com/english/advisories/2009/2034","source":"cve@mitre.org"},{"url":"http://www.vupen.com/english/advisories/2009/2232","source":"cve@mitre.org"},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-035","source":"cve@mitre.org"},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-037","source":"cve@mitre.org"},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-060","source":"cve@mitre.org"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6289","source":"cve@mitre.org"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6311","source":"cve@mitre.org"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6373","source":"cve@mitre.org"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7581","source":"cve@mitre.org"},{"url":"http://blogs.technet.com/srd/archive/2009/08/11/ms09-037-why-we-are-using-cve-s-already-used-in-ms09-035.aspx","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://marc.info/?l=bugtraq&m=126592505426855&w=2","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/35967","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/36187","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/36374","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://secunia.com/advisories/36746","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://sunsolve.sun.com/search/document.do?assetkey=1-66-266108-1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.adobe.com/support/security/advisories/apsa09-04.html","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.adobe.com/support/security/bulletins/apsb09-10.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.adobe.com/support/security/bulletins/apsb09-11.html","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.adobe.com/support/security/bulletins/apsb09-13.html","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.novell.com/support/viewContent.do?externalId=7004997&sliceId=1","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.securityfocus.com/bid/35832","tags":["Patch"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.us-cert.gov/cas/techalerts/TA09-195A.html","tags":["US 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Resource"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.vupen.com/english/advisories/2009/2034","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"http://www.vupen.com/english/advisories/2009/2232","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-035","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-037","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-060","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6289","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6311","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6373","source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A7581","source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2009-0901","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}