# CVE-2026-69947: Windows Overlay Filter heap-based buffer overflow

Source: https://junglewise.ai/threats/cve-2026-69947-heap-based-buffer-overflow-in-windows-overlay-filter-allows-an  
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-2026-69947 · Severity: medium · CVSS 6.8 · Published 2026-10-13

Windows Overlay Filter contains a heap-based buffer overflow vulnerability that could allow an attacker with physical access to execute arbitrary code on an affected system. This could lead to complete system compromise, data theft, or malware installation on Windows machines running the vulnerable component.

Technologies: [Microsoft Windows Overlay Filter](https://junglewise.ai/threats/technologies/windows-overlay-filter). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-69947 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-69947 being exploited in the wild.

**How severe is CVE-2026-69947?** Medium severity, with a CVSS score of 6.8, published 13 October 2026.

**Which products and versions are affected?** Microsoft Windows Overlay Filter.

**Is there a fix for CVE-2026-69947?** 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-2026-69947 attacked?** It is attacked with physical access, in an operating system.

**Am I affected by CVE-2026-69947?** Check whether you run Microsoft Windows Overlay Filter. 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

The vulnerability is a heap-based buffer overflow in Windows Overlay Filter that requires physical access to the device to exploit. An attacker with physical access could trigger the overflow to execute code with elevated privileges, potentially bypassing security controls and gaining full system access.

## Affected products

- Microsoft Windows Overlay Filter

## Timeline

- 2026-10-13: advisory

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69947](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69947)

## Related threats

- [Windows Overlay Filter race condition privilege escalation](https://junglewise.ai/threats/cve-2026-121670-concurrent-execution-using-shared-resource-with-improper)
- [Microsoft Windows Overlay Filter race condition privilege escalation](https://junglewise.ai/threats/cve-2026-112813-concurrent-execution-using-shared-resource-with-improper)
- [Windows Overlay Filter integer overflow privilege escalation](https://junglewise.ai/threats/cve-2026-112760-integer-overflow-or-wraparound-in-windows-overlay-filter-allows)
- [Microsoft Windows Overlay Filter information disclosure](https://junglewise.ai/threats/cve-2026-108409-exposure-of-sensitive-system-information-to-an-unauthorized)
- [Windows Overlay Filter missing authorization](https://junglewise.ai/threats/cve-2026-96315-missing-authorization-in-windows-overlay-filter-allows-an)