Quick answers
- Is CVE-2026-69371 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-69371 being exploited in the wild.
- How severe is CVE-2026-69371?
- High severity, with a CVSS score of 8, published 8 September 2026.
- Which products and versions are affected?
- Microsoft Windows Overlay Filter.
- Is there a fix for CVE-2026-69371?
- 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-2026-69371 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-69371?
- 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
This vulnerability is a heap-based buffer overflow in Microsoft's Windows Overlay Filter component. The flaw requires authentication and network-based access to exploit, allowing an authorized attacker to overflow a heap buffer and achieve privilege escalation. By corrupting heap memory, an attacker can potentially overwrite critical data structures to gain elevated privileges beyond their current authorization level. Microsoft has issued a security update to address this vulnerability.
Affected products
- Microsoft Windows Overlay Filter
Timeline
- 2026-09-08: disclosed