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CVE-2009-1537

Microsoft DirectX NULL Byte Overwrite Vulnerability

Microsoft DirectX

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."

CVSS Score
8.8
High
EPSS — Exploit Probability
53%
Riskier than 98% of all CVEs
Exploitation
Confirmed in the wild
Used in ransomware campaigns
Remediation
Patch available
Federal deadline 2026-06-03
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. Deadline for federal agencies: 2026-06-03.

NVD entry Vendor patch PoC / advisory CISA KEV

4 articles across 3 outlets · first covered May 20, 2026 · latest May 21, 2026

Coverage timeline

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