# CVE-2009-1537: Microsoft DirectX NULL Byte Overwrite Vulnerability

> CVE-2009-1537: Microsoft DirectX NULL Byte Overwrite Vulnerability. CVSS 8.8 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2009-1537
Last updated: 2026-06-16T23:07:28Z

- Published: 2009-05-29 18:00 UTC · Updated: 2026-06-16 23:07 UTC · Assigner: microsoft
- CVSS: 8.8 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
- EPSS: 51.4%, 99th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2026-05-20, federal due date 2026-06-03, ransomware use: Unknown

## Description

Unspecified vulnerability in the QuickTime Movie Parser Filter in quartz.dll in DirectShow in Microsoft DirectX 7.0 through 9.0c on Windows 2000 SP4, Windows XP SP2 and SP3, and Windows Server 2003 SP2 allows remote attackers to execute arbitrary code via a crafted QuickTime media file, as exploited in the wild in May 2009, aka "DirectX NULL Byte Overwrite Vulnerability."

## 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.

## Affected vendors and products

- Microsoft: DirectX

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2009-1537)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2009-1537)
- [http://blogs.technet.com/msrc/archive/2009/05/28/microsoft-security-advisory-971778-vulnerability-in-microsoft-directshow-released.aspx](http://blogs.technet.com/msrc/archive/2009/05/28/microsoft-security-advisory-971778-vulnerability-in-microsoft-directshow-released.aspx)
- [http://blogs.technet.com/srd/archive/2009/05/28/new-vulnerability-in-quicktime-parsing.aspx](http://blogs.technet.com/srd/archive/2009/05/28/new-vulnerability-in-quicktime-parsing.aspx)
- [http://isc.sans.org/diary.html?storyid=6481](http://isc.sans.org/diary.html?storyid=6481)
- [http://osvdb.org/54797](http://osvdb.org/54797)
- [https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-028](https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-028)
- [http://secunia.com/advisories/35268](http://secunia.com/advisories/35268)
- [https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6237](https://oval.cisecurity.org/repository/search/definition/oval%253Aorg.mitre.oval%253Adef%253A6237)
- [http://www.microsoft.com/technet/security/advisory/971778.mspx](http://www.microsoft.com/technet/security/advisory/971778.mspx)
- [http://www.securityfocus.com/bid/35139](http://www.securityfocus.com/bid/35139)
- [http://www.securitytracker.com/id?1022299](http://www.securitytracker.com/id?1022299)
- [http://www.us-cert.gov/cas/techalerts/TA09-195A.html](http://www.us-cert.gov/cas/techalerts/TA09-195A.html)
- [http://www.vupen.com/english/advisories/2009/1445](http://www.vupen.com/english/advisories/2009/1445)
- [http://www.vupen.com/english/advisories/2009/1886](http://www.vupen.com/english/advisories/2009/1886)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2009-1537 · Markdown: https://rewindex.com/cve/CVE-2009-1537.md · JSON: https://rewindex.com/api/v1/cves/CVE-2009-1537 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:47:38.962Z