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Vulnerability record · CVE-2009-2494 · published 12 August 2009

CVE-2009-2494: Microsoft windows 2000 code injection vulnerability

Microsoft · Windows 2000

The Active Template Library (ATL) in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 Gold and SP2 allows remote attackers to execute arbitrary code via vectors related to erroneous free operations after reading a variant from a stream and deleting this variant, aka "ATL Object Type Mismatch Vulnerability."

9.8 CVSS 3.1 Critical EPSS 42% · top 1.3% CWE-94 · Code injection
9.8CVSS 3.1 base score, v2 10.0
42%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
18References
16 Jun 2026Last modified by NVD

Description

The Active Template Library (ATL) in Microsoft Windows 2000 SP4, XP SP2 and SP3, Server 2003 SP2, Vista Gold, SP1, and SP2, and Server 2008 Gold and SP2 allows remote attackers to execute arbitrary code via vectors related to erroneous free operations after reading a variant from a stream and deleting this variant, aka "ATL Object Type Mismatch Vulnerability."

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

Affected products

5 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://osvdb.org/56910
http://secunia.com/advisories/36187 Vendor Advisory
http://www.securityfocus.com/bid/35982 Patch
http://www.securitytracker.com/id?1022712
http://www.us-cert.gov/cas/techalerts/TA09-223A.html US Government Resource
http://www.vupen.com/english/advisories/2009/2232 Vendor Advisory
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-037
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5708
http://blogs.technet.com/srd/archive/2009/08/11/ms09-037-why-we-are-using-cve-s-already-used-in-ms09-035.aspx
http://osvdb.org/56910
http://secunia.com/advisories/36187 Vendor Advisory
http://www.securityfocus.com/bid/35982 Patch
http://www.securitytracker.com/id?1022712
http://www.us-cert.gov/cas/techalerts/TA09-223A.html US Government Resource
http://www.vupen.com/english/advisories/2009/2232 Vendor Advisory
https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-037
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A5708

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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-2009-2494), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.