# CVE-2026-69601: Microsoft Windows Media Foundation heap buffer overflow

Source: https://junglewise.ai/threats/cve-2026-69601-microsoft-windows-media-foundation-heap-buffer-overflow  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-08. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-69601 · Severity: high · CVSS 8.8 · Published 2026-09-08

Windows Media Foundation, a core Windows component responsible for playing and processing audio and video files, contains a heap buffer overflow vulnerability that could allow an attacker to execute malicious code remotely. An attacker could exploit this by sending a specially crafted media file or network stream, potentially compromising system integrity and enabling unauthorized access to corporate data or systems.

Technologies: [Microsoft Windows Media Foundation](https://junglewise.ai/threats/technologies/windows-media-foundation). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-69601 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-69601 being exploited in the wild.

**How severe is CVE-2026-69601?** High severity, with a CVSS score of 8.8, published 8 September 2026.

**Which products and versions are affected?** Microsoft Windows Media Foundation <UNKNOWN>.

**Is there a fix for CVE-2026-69601?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-69601 attacked?** It is attacked over the network, in an operating system.

**Am I affected by CVE-2026-69601?** Check whether you run Microsoft Windows Media Foundation at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A heap-based buffer overflow exists in Microsoft Windows Media Foundation that allows remote code execution. The vulnerability is triggered through network-reachable attack vectors, likely by processing malformed or malicious media files or network streams. An attacker can exploit this flaw without authentication to achieve arbitrary code execution with the privileges of the affected process. The vulnerability is not currently known to be actively exploited in the wild. Microsoft has released security updates to address this issue.

## Affected products

- Microsoft Windows Media Foundation <UNKNOWN>

## Timeline

- 2026-09-08: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69601](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69601)

## Related threats

- [Microsoft Windows Media Foundation heap-based buffer overflow](https://junglewise.ai/threats/cve-2026-96157-heap-based-buffer-overflow-in-microsoft-windows-media-foundation)
- [Microsoft Windows Media Foundation heap buffer overflow](https://junglewise.ai/threats/cve-2026-122168-heap-based-buffer-overflow-in-microsoft-windows-media-foundation)
- [Microsoft Windows Media Foundation privilege escalation via deserialization](https://junglewise.ai/threats/cve-2026-96186-deserialization-of-untrusted-data-in-microsoft-windows-media)
- [Microsoft Windows Media Foundation heap overflow](https://junglewise.ai/threats/cve-2026-83517-heap-based-buffer-overflow-in-microsoft-windows-media-foundation)
- [Microsoft Windows Media Foundation out-of-bounds read](https://junglewise.ai/threats/cve-2026-70044-out-of-bounds-read-in-microsoft-windows-media-foundation-allows)