Quick answers
- Is CVE-2026-77905 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-77905 being exploited in the wild.
- How severe is CVE-2026-77905?
- High severity, with a CVSS score of 7, published 8 September 2026.
- Which products and versions are affected?
- Microsoft Windows Management Instrumentation.
- Is there a fix for CVE-2026-77905?
- 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-2026-77905 attacked?
- It is attacked with local access.
- Am I affected by CVE-2026-77905?
- Check whether you run Microsoft Windows Management Instrumentation. 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 use-after-free memory safety issue in Windows Management Instrumentation. The defect allows an authorized attacker with local access to trigger a code path that accesses memory that has already been freed, enabling arbitrary code execution with elevated privileges. The vulnerability requires local authentication and user-level access to exploit. Microsoft has released patches to address this issue.
Affected products
- Microsoft Windows Management Instrumentation
Timeline
- 2026-09-08: disclosed