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 VariantClea...

high 8.8 CVSS 3.1
Published: Jul 29, 2009
Modified: May 27, 2026
Vendor: Microsoft
Product: Visual C\+\+
Versions: 2005,2008,2003

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."

References

Related CVEs

CVE-2026-45584 high · 8.1
Heap-based buffer overflow in Microsoft Defender allows an unauthorized attacker to execute code over a network.
CVE-2026-45498 medium · 4.0
Microsoft Defender Denial of Service Vulnerability
CVE-2026-42834 high · 7.8
Improper link resolution before file access ('link following') in Azure Portal Windows Admin Center allows an authorized attacker to elevate privileges locally.
CVE-2026-41091 high · 7.8
Improper link resolution before file access ('link following') in Microsoft Defender allows an authorized attacker to elevate privileges locally.
CVE-2026-45585 medium · 6.8
Microsoft is aware of a security feature bypass vulnerability in Windows publicly referred to as "YellowKey". The proof of concept for this vulnerability has been made pu
CVE-2026-45495 high · 8.8
Microsoft Edge (Chromium-based) Remote Code Execution Vulnerability