CVE-2009-1537

HIGH8.8

CISA KEV

Published 2009-05-29 · Updated 2026-06-16 · Source secure@microsoft.com

Summary

CVE-2009-1537 is a high-severity (CVSS 8.8) vulnerability in Microsoft DirectX. CISA added it to the Known Exploited Vulnerabilities catalog on May 20, 2026, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by June 3, 2026. CISA does not currently list it as used in ransomware campaigns. Microsoft has 390 vulnerabilities in the KEV catalog, 117 of them linked to ransomware.

All 390 known-exploited Microsoft vulnerabilities →

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."

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

CWE-158

CISA Known-Exploited Vulnerability

Product: Microsoft — DirectX

Name: Microsoft DirectX NULL Byte Overwrite Vulnerability

Date added: 2026-05-20 · Due: 2026-06-03

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.

References

View on NVD

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