# CVE-2026-114167: Microsoft Windows Codecs Library heap-based buffer overflow

Source: https://junglewise.ai/threats/cve-2026-114167-heap-based-buffer-overflow-in-microsoft-windows-codecs-library  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-10. Updated: 2026-11-10  
License: CC BY 4.0 with a link back

CVE-2026-114167 · Severity: high · CVSS 7.8 · Published 2026-11-10

A flaw in Microsoft Windows Codecs Library, which processes images and video files, allows an attacker with local access to execute arbitrary code on the system. Successful exploitation could lead to complete system compromise, data theft, or malware installation.

Technologies: [Microsoft Windows Codecs Library](https://junglewise.ai/threats/technologies/windows-codecs-library). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-114167 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-114167 being exploited in the wild.

**How severe is CVE-2026-114167?** High severity, with a CVSS score of 7.8, published 10 November 2026.

**Which products and versions are affected?** Microsoft Windows Codecs Library.

**Is there a fix for CVE-2026-114167?** 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-2026-114167 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-114167?** Check whether you run Microsoft Windows Codecs Library. 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 the Windows Codecs Library, allowing local code execution when processing specially crafted media files. The vulnerability requires local access and user interaction to trigger the overflow, but once exploited grants the attacker code execution in the context of the affected process.

## Affected products

- Microsoft Windows Codecs Library

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-114167](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-114167)

## Related threats

- [Microsoft Windows Codecs Library information disclosure via uninitialized resource](https://junglewise.ai/threats/cve-2026-96150-use-of-uninitialized-resource-in-microsoft-windows-codecs-library)
- [Microsoft Windows Codecs Library heap buffer overflow](https://junglewise.ai/threats/cve-2026-114165-heap-based-buffer-overflow-in-microsoft-windows-codecs-library)
- [Microsoft Windows Codecs Library integer underflow](https://junglewise.ai/threats/cve-2026-114164-integer-underflow-wrap-or-wraparound-in-microsoft-windows-codecs)
- [Microsoft Windows Codecs Library integer overflow](https://junglewise.ai/threats/cve-2026-108400-integer-overflow-or-wraparound-in-microsoft-windows-codecs)
- [Microsoft Windows Codecs Library stack-based buffer overflow](https://junglewise.ai/threats/cve-2026-102199-stack-based-buffer-overflow-in-microsoft-windows-codecs-library)