Microsoft DirectX NULL Byte Overwrite Vulnerability

HIGH 8.8EXPLOITED (CISA KEV)CVE-2009-1537 · Published 29/05/2009 · updated 16/06/2026

Microsoft DirectX NULL Byte Overwrite Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 20/05/2026. Patch affected systems as an emergency.

Package	Affected versions	Patched versions
directx microsoft	`= 7.0= 7.0a= 7.1= 8.1= 8.1b= 9.0= 9.0a= 9.0b= 9.0c`	No fix yet

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."

References

blogs.technet.com/msrc/archive/2009/05/28/microsoft-security-advisory-971778-vulnerability-in-microsoft-directshow-released.aspx · Vendor Advisory
blogs.technet.com/srd/archive/2009/05/28/new-vulnerability-in-quicktime-parsing.aspx · Vendor Advisory
isc.sans.org/diary.html · Not Applicable
osvdb.org/54797 · Broken Link
secunia.com/advisories/35268 · Vendor Advisory
microsoft.com/technet/security/advisory/971778.mspx · Patch
securityfocus.com/bid/35139 · Broken Link
securitytracker.com/id · Broken Link
us-cert.gov/cas/techalerts/TA09-195A.html · US Government Resource
vupen.com/english/advisories/2009/1445 · Vendor Advisory
vupen.com/english/advisories/2009/1886 · Vendor Advisory
docs.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-028 · Vendor Advisory
oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A6237 · Broken Link
cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
CISA KEV · CVE-2009-1537

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