Microsoft DirectX NULL Byte Overwrite Vulnerability

Microsoft 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. Added to CISA KEV on 2026-05-20 (federal deadline 2026-06-03).

First seen: 20 May 2026
Last update: 20 May 2026, 12:00 UTC
Identifiers: CVE-2009-1537
Source: CISA KEV

Check this repository for exposure to one security incident from pwned.coffee. Report first, change nothing until I say so.

## Microsoft DirectX NULL Byte Overwrite Vulnerability
Severity: high, exploited in the wild. Patch status: patched.
Affected: Microsoft DirectX
Ids: CVE-2009-1537

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. Added to CISA KEV on 2026-05-20 (federal deadline 2026-06-03).

## Steps
1. Search the repo, its CI and infra config for Microsoft DirectX. If present, report the version in use and whether it's affected.

## Report
A table: file, product or package, version in use, affected yes/no, exact fix. Then anything a human has to check outside the repo.

If you have the pwned.coffee MCP server (https://pwned.coffee/mcp), call lookup_cve("CVE-2009-1537") for the latest, and check_repo with this repo's lockfiles, Dockerfiles and workflows for a full receipt.
Sources: https://learn.microsoft.com/en-us/security-updates/securitybulletins/2009/ms09-028 https://nvd.nist.gov/vuln/detail/CVE-2009-1537
https://pwned.coffee/i/microsoft-directx-null-byte-overwrite-vulnerability-cve-2009-1537

Sources

Totalone hot coffee