Intelligence online17 sources monitored8 actively exploited 7d26 published 24hChecked recently
Vulnerability record

CVE-2009-1537

Microsoft DirectX NULL Byte Overwrite Vulnerability

HighExploitation confirmedCISA KEV
What should I do?

This vulnerability is in the CISA Known Exploited Vulnerabilities catalog: attackers are using it. If you run DirectX, fix it now.

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.

US federal civilian agencies must remediate by Jun 3, 2026.

Patch status

Official fix available since

Apply the vendor's update to every affected system. Check the fixed-in versions below where known.

Basis: NVD patch reference

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."

Source: NIST National Vulnerability Database. Official vulnerability data, reproduced as published.

Affected products

ProductVendorAffected versionsSource
DirectXMicrosoft7.0; 7.0a; 7.1; 8.1; 8.1b; 9.0KEV

Sources: KEV = CISA Known Exploited Vulnerabilities catalog.

Intelligence timeline

Developments from the last 30 days, newest first.

  1. CVSS scoredUpdateKEV

    CVE-2009-1537 scored CVSS 8.8: Microsoft DirectX, Microsoft DirectX NULL Byte Overwrite Vulnerability

    CISA lists this as exploited in the wild. Unpatched DirectX systems are exposed to active attacks now.

    Basis: NIST National Vulnerability Database

  2. Patch releasedUpdateKEV

    Patch released for CVE-2009-1537: Microsoft DirectX, Microsoft DirectX NULL Byte Overwrite Vulnerability

    An official fix is now available for Microsoft DirectX. This vulnerability is being exploited, so apply it promptly.

    Basis: NVD patch reference

1 earlier event is available with a subscription. See plans.

Coverage

We have not published a story about this vulnerability yet.

References

  • learn.microsoft.com https://learn.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-028
  • nvd.nist.gov https://nvd.nist.gov/vuln/detail/CVE-2009-1537
  • blogs.technet.com http://blogs.technet.com/msrc/archive/2009/05/28/microsoft-security-advisory-971778-vulnerability-in-microsoft…
  • blogs.technet.com http://blogs.technet.com/srd/archive/2009/05/28/new-vulnerability-in-quicktime-parsing.aspx
  • isc.sans.org http://isc.sans.org/diary.html?storyid=6481
  • osvdb.org http://osvdb.org/54797
  • secunia.com http://secunia.com/advisories/35268
  • microsoft.com http://www.microsoft.com/technet/security/advisory/971778.mspx
  • securityfocus.com http://www.securityfocus.com/bid/35139
  • securitytracker.com http://www.securitytracker.com/id?1022299
  • us-cert.gov http://www.us-cert.gov/cas/techalerts/TA09-195A.html
  • vupen.com http://www.vupen.com/english/advisories/2009/1445
  • vupen.com http://www.vupen.com/english/advisories/2009/1886
  • docs.microsoft.com https://docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-028
  • oval.cisecurity.org https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6237
  • cisa.gov https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2009-1537