CVE-2009-1537: Microsoft DirectX NULL Byte Overwrite Vulnerability

Added to the CISA Known Exploited Vulnerabilities catalog on 20 May 2026. Vendor: Microsoft. Product: DirectX.

Microsoft DirectX contains a NULL byte overwrite vulnerability in the QuickTime Movie Parser Filter in quartz.dll in DirectShow which could allow remote attackers to execute arbitrary code via a crafted QuickTime media file.

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. (due 03 Jun 2026)