CVE-2009-2493

What it is

The Active Template Library (ATL) in Microsoft Visual Studio .NET 2003 SP1, Visual Studio 2005 SP1 and 2008 Gold and SP1, 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 properly restrict use of OleLoadFromStream in instantiating objects from data streams, which allows remote attackers to execute arbitrary code via a crafted HTML document with an ATL (1) component or (2) control, related to ATL headers and bypassing security policies, aka "ATL COM Initialization Vulnerability."

At a glance

Exploitability

Can be exploited over the network without logging in, but needs a user to act. High risk of data exposure, data tampering, service disruption.

Exploit odds

37.8% chance of exploitation in the next 30 days (EPSS). Higher than most.

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2009-07-17 00:00 UTC ReservedThe CVE id was reserved by its CNA
2. 2009-07-29 17:30 UTC PublishedDisclosed publicly on CVE.org and NVD
3. 2026-06-16 23:09 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 37.8% in the next 30 days (EPSS).
• Severity: 8.8 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2009-07-29 17:30 UTC

Last modified

2026-06-16 23:09 UTC

Exploit probability

37.8% · EPSS, next 30 days

Weakness

CWE-264

Record status

Modified

Affected

• Microsoft Visual c\+\+ 2005
• Microsoft Visual c\+\+ 2008
• Microsoft Windows 2000
• Microsoft Windows 2003 Server
• Microsoft Windows Server 2008
• Microsoft Windows Vista
• Microsoft Windows Xp
• Microsoft Visual Studio 2003

Attack profile CVSS 3.1 · 8.8

Attack vector

Network

Complexity

Low

Privileges needed

None

User interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2009-2493.md and follow it. Check whether this project is affected by CVE-2009-2493. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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