Quick answers
- Is CVE-2026-69511 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-69511 being exploited in the wild.
- How severe is CVE-2026-69511?
- High severity, with a CVSS score of 8.8, published 8 September 2026.
- Which products and versions are affected?
- Microsoft Windows Media Foundation.
- Is there a fix for CVE-2026-69511?
- 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-2026-69511 attacked?
- It is attacked over the network.
- Am I affected by CVE-2026-69511?
- Check whether you run Microsoft Windows Media Foundation. 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 vulnerability exists in Microsoft Windows Media Foundation, a multimedia framework component responsible for handling audio and video codecs and playback. The vulnerability is triggered when processing malformed media streams, allowing an attacker to overwrite heap memory and achieve remote code execution. The attack requires network access but does not require authentication or elevated privileges. An attacker can exploit this by sending a specially crafted media file to trigger the overflow, resulting in code execution with the privileges of the Media Foundation service or user process. Microsoft has released security updates to address this issue.
Affected products
- Microsoft Windows Media Foundation
Timeline
- 2026-09-08: disclosed