CVE-2009-4309

What it is

Heap-based buffer overflow in the Intel Indeo41 codec for Windows Media Player in Microsoft Windows 2000 SP4, XP SP2 and SP3, and Server 2003 SP2 allows remote attackers to execute arbitrary code via a large size value in a movi record in an IV41 stream in a media file, as demonstrated by an AVI file.

At a glance

Exploitability

Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.

Exploit odds

24.1% 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. 2009-12-13 01:30 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-16 23:13 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 24.1% in the next 30 days (EPSS).
• Severity: 9.3 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2009-12-13 01:30 UTC

Last modified

2026-06-16 23:13 UTC

Exploit probability

24.1% · EPSS, next 30 days

Weakness

CWE-119 · Buffer errors

Record status

Modified

Affected

• Microsoft Windows Media Player
• Microsoft Windows 2000
• Microsoft Windows 2003 Server
• Microsoft Windows Xp

Attack profile CVSS 2.0 · 9.3

Attack vector

Network

Complexity

Medium

Authentication

None

Confidentiality

Complete

Integrity

Complete

Availability

Complete

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-2009-4309.md and follow it. Check whether this project is affected by CVE-2009-4309. 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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