# CVE-2026-69942: Microsoft Windows Overlay Filter buffer over-read

Source: https://junglewise.ai/threats/cve-2026-69942-buffer-over-read-in-windows-overlay-filter-allows-an-authorized  
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-2026-69942 · Severity: high · CVSS 7.8 · Published 2026-10-13

Windows Overlay Filter is a kernel-level Windows component that processes filter operations. A buffer over-read vulnerability allows an authorized attacker with local access to execute arbitrary code on the affected system, potentially compromising the entire machine.

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-2026-69942 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-69942 being exploited in the wild.

**How severe is CVE-2026-69942?** High severity, with a CVSS score of 7.8, published 13 October 2026.

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

**Is there a fix for CVE-2026-69942?** 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-2026-69942 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-69942?** 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

A buffer over-read flaw exists in Windows Overlay Filter that allows an authenticated local attacker to read out-of-bounds memory. The vulnerability requires attacker privilege to trigger but can lead to code execution through memory disclosure and subsequent payload injection.

## Affected products

- Microsoft Windows Overlay Filter

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69942](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-69942)

## 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)