---
id: "CVE-2009-1537"
kind: "vulnerability"
aliases: ["CVE-2009-1537"]
title: "Unspecified vulnerability in the QuickTime Movie Parser Filter in quartz.dll in DirectShow in Microsoft DirectX 7.0\u2026"
severity: "critical"
cvss: 9.3
epss: null
exploited: true
status: "open"
category: "vendor"
products: [{"name": "Microsoft DirectX", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft directx", "fixed": [], "affected": "= 7.0", "ecosystem": "vendor"}, {"name": "microsoft directx", "fixed": [], "affected": "= 7.0a", "ecosystem": "vendor"}, {"name": "microsoft directx", "fixed": [], "affected": "= 7.1", "ecosystem": "vendor"}, {"name": "microsoft directx", "fixed": [], "affected": "= 8.1", "ecosystem": "vendor"}, {"name": "microsoft directx", "fixed": [], "affected": "= 8.1b", "ecosystem": "vendor"}, {"name": "microsoft directx", "fixed": [], "affected": "= 9.0", "ecosystem": "vendor"}, {"name": "microsoft directx", "fixed": [], "affected": "= 9.0a", "ecosystem": "vendor"}, {"name": "microsoft directx", "fixed": [], "affected": "= 9.0b", "ecosystem": "vendor"}, {"name": "microsoft directx", "fixed": [], "affected": "= 9.0c", "ecosystem": "vendor"}, {"name": "microsoft windows 2000", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows 2003 server", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows server 2003", "fixed": [], "affected": "", "ecosystem": "vendor"}, {"name": "microsoft windows xp", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["directshow", "exploited", "microsoft-directx", "vendor", "windows"]
not_affected_if: ["unknown"]
published_at: "2009-05-29T18:30:00+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-23T23:44:51+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2009-1537", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2009-1537", "first_seen_at": "2026-10-23T23:44:51+00:00"}]
---

# Unspecified vulnerability in the QuickTime Movie Parser Filter in quartz.dll in DirectShow in Microsoft DirectX 7.0…

Microsoft DirectX's DirectShow QuickTime Movie Parser Filter in quartz.dll has a NULL byte overwrite flaw. A remote attacker who supplies a crafted QuickTime media file can execute arbitrary code.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Microsoft DirectX affected ? fixed ?
- vendor:microsoft directx affected = 7.0 fixed ?
- vendor:microsoft directx affected = 7.0a fixed ?
- vendor:microsoft directx affected = 7.1 fixed ?
- vendor:microsoft directx affected = 8.1 fixed ?
- vendor:microsoft directx affected = 8.1b fixed ?
- vendor:microsoft directx affected = 9.0 fixed ?
- vendor:microsoft directx affected = 9.0a fixed ?
- vendor:microsoft directx affected = 9.0b fixed ?
- vendor:microsoft directx affected = 9.0c fixed ?
- vendor:microsoft windows 2000 affected ? fixed ?
- vendor:microsoft windows 2003 server affected ? fixed ?
- vendor:microsoft windows server 2003 affected ? fixed ?
- vendor:microsoft windows xp affected ? fixed ?

## Fix

Apply the vendor mitigations referenced by CISA, or discontinue use of the affected product if mitigations are unavailable.

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2009-1537
- 2026-10-23T23:44:51+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2009-1537

## From the sources

Microsoft DirectX contains a NULL byte overwrite vulnerability in the QuickTime Movie Parser Filter in quartz.dll in DirectShow which could allow remote attackers to execute arbitrary code via a crafted QuickTime media file.

CISA required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

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