# CVE-2026-114165: Microsoft Windows Codecs Library heap buffer overflow

Source: https://junglewise.ai/threats/cve-2026-114165-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-2026-114165 · Severity: high · CVSS 7.8 · Published 2026-11-10

The Windows Codecs Library is a core Windows component used to decode and display images and video. A heap buffer overflow in this library allows a local attacker to execute arbitrary code on an affected system, potentially leading to complete system compromise.

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-2026-114165 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-114165 being exploited in the wild.

**How severe is CVE-2026-114165?** 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-2026-114165?** 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-2026-114165 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-114165?** 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, exploitable by a local attacker with no elevated privileges required. The vulnerability results in arbitrary code execution within the context of the application using the codec library, allowing an attacker to gain elevated privileges or lateral movement on a compromised system.

## Affected products

- Microsoft Windows Codecs Library

## Timeline

- 2026-11-10: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-114165](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-114165)

## 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-based buffer overflow](https://junglewise.ai/threats/cve-2026-114167-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)