# CVE-2026-96186: Microsoft Windows Media Foundation privilege escalation via deserialization

Source: https://junglewise.ai/threats/cve-2026-96186-deserialization-of-untrusted-data-in-microsoft-windows-media  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-96186 · Severity: high · CVSS 7.8 · Published 2026-10-13

Windows Media Foundation, a component of Windows that processes and plays multimedia files, contains a flaw in how it handles untrusted data. An attacker with local access to a computer could exploit this to gain elevated privileges, potentially taking control of the system.

Technologies: [Microsoft Windows Media Foundation](https://junglewise.ai/threats/technologies/windows-media-foundation), [Microsoft Windows 10 1607](https://junglewise.ai/threats/technologies/windows-10-1607), [Microsoft Windows 10 1809](https://junglewise.ai/threats/technologies/windows-10-1809), [Microsoft Windows 10 21h2](https://junglewise.ai/threats/technologies/windows-10-21h2), [Microsoft Windows 10 22h2](https://junglewise.ai/threats/technologies/windows-10-22h2), [Microsoft Windows 11 23h2](https://junglewise.ai/threats/technologies/windows-11-23h2), [Microsoft Windows 11 24h2](https://junglewise.ai/threats/technologies/windows-11-24h2), [Microsoft Windows 11 25h2](https://junglewise.ai/threats/technologies/windows-11-25h2), [Microsoft Windows 11 26h1](https://junglewise.ai/threats/technologies/windows-11-26h1), [Microsoft Windows 11 26h2](https://junglewise.ai/threats/technologies/windows-11-26h2), [Microsoft Windows Server 2012](https://junglewise.ai/threats/technologies/windows-server-2012), [Microsoft Windows Server 2016](https://junglewise.ai/threats/technologies/windows-server-2016), [Microsoft Windows Server 2019](https://junglewise.ai/threats/technologies/windows-server-2019), [Microsoft Windows Server 2022](https://junglewise.ai/threats/technologies/windows-server-2022), [Microsoft Windows Server 2025](https://junglewise.ai/threats/technologies/windows-server-2025). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-96186 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-96186 being exploited in the wild.

**How severe is CVE-2026-96186?** High severity, with a CVSS score of 7.8, published 13 October 2026.

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

**Is there a fix for CVE-2026-96186?** 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-2026-96186 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-96186?** Check whether you run Microsoft Windows Media Foundation, Microsoft Windows 10 1607, Microsoft Windows 10 1809 or one of the others listed. 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 deserialization vulnerability in Windows Media Foundation allows an authorized local attacker to execute arbitrary code with elevated privileges. The vulnerability requires local access but no special preconditions beyond existing user-level authentication. Successful exploitation results in privilege escalation on the affected system.

## Affected products

- Microsoft Windows Media Foundation

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96186](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-96186)

## 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)
- [Windows DNS Server out-of-bounds read](https://junglewise.ai/threats/cve-2026-97844-out-of-bounds-read-in-dns-server-allows-an-authorized-attacker-to)
- [Windows DNS Server out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-97843-out-of-bounds-read-in-dns-server-allows-an-authorized-attacker-to)
- [Windows DNS Server out-of-bounds read information disclosure](https://junglewise.ai/threats/cve-2026-97842-out-of-bounds-read-in-dns-server-allows-an-authorized-attacker-to)