Quick answers
- Is CVE-2026-88071 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-88071 being exploited in the wild.
- How severe is CVE-2026-88071?
- High severity, with a CVSS score of 7.8, published 13 October 2026.
- Which products and versions are affected?
- Microsoft Windows Hyper-V.
- Is there a fix for CVE-2026-88071?
- 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-2026-88071 attacked?
- It is attacked with local access, in an operating system.
- Am I affected by CVE-2026-88071?
- Check whether you run Microsoft Windows Hyper-V, Microsoft Windows 11 23h2, Microsoft Windows 11 24h2 or one of the others listed. 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 double-free vulnerability exists in Windows Hyper-V's memory handling. The attack requires local access and existing authorization (authenticated user), and allows privilege escalation from a lower privilege context to system or administrative level. A successful exploit would grant the attacker elevated code execution capabilities on the host system.
Affected products
- Microsoft Windows Hyper-V
Timeline
- 2026-10-13: disclosed