CVE-2009-1537 Microsoft DirectX NULL Byte Overwrite
Remote attackers can execute arbitrary code via a crafted QuickTime media file exploiting a NULL byte overwrite in the DirectX Movie Parser Filter.
- Exploited in the wild
- Since 20 May 2026
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2009-1537?
CVE-2009-1537 is a high-severity memory corruption vulnerability in Microsoft Windows 2000, published on 29 May 2009. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official 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."
Weakness: CWE-158
Which versions are affected by CVE-2009-1537?
It affects 5 products.
Products include Microsoft Directx, Microsoft Windows 2000, Microsoft Windows 2003 Server, Microsoft Windows Server 2003, Microsoft Windows Xp.
How do I fix CVE-2009-1537?
No fix has been published for CVE-2009-1537 yet. Limit exposure of the affected software until one is available. US federal agencies must fix it by 3 Jun 2026.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2009-1537 being exploited?
Yes. Attackers have exploited CVE-2009-1537 in the wild since at least 20 May 2026.
Other vulnerabilities in Microsoft Windows 2000
Sources
Also known as GHSA-qvw7-mg6g-qm9m.