Quick answers
- Is CVE-2026-108409 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-108409 being exploited in the wild.
- How severe is CVE-2026-108409?
- Medium severity, with a CVSS score of 5.5, published 10 November 2026.
- Which products and versions are affected?
- Microsoft Windows Overlay Filter.
- Is there a fix for CVE-2026-108409?
- 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-2026-108409 attacked?
- It is attacked with local access.
- Am I affected by CVE-2026-108409?
- 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 an information disclosure issue in Windows Overlay Filter that allows an authorized local attacker to access sensitive system information outside their normal control sphere. The flaw requires local access and existing user privileges but does not require user interaction. Exploitation results in unauthorized disclosure of system information.
Affected products
- Microsoft Windows Overlay Filter