Quick answers
- Is CVE-2026-72961 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-72961 being exploited in the wild.
- How severe is CVE-2026-72961?
- High severity, with a CVSS score of 8.2, published 8 September 2026.
- Which products and versions are affected?
- Microsoft Windows Hyper-V <UNKNOWN>.
- Is there a fix for CVE-2026-72961?
- 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-2026-72961 attacked?
- It is attacked with local access, in an operating system.
- Am I affected by CVE-2026-72961?
- Check whether you run Microsoft Windows Hyper-V at an affected version. 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 an out-of-bounds read in the Windows Hyper-V hypervisor. The flaw allows an authorized local attacker to read memory outside intended boundaries, which can be leveraged to escalate privileges on the Hyper-V host system. The attack requires local access to the host and authenticated privileges to interact with Hyper-V. Exploitation enables privilege escalation from an authenticated local account to a higher privilege level. A patch is available from Microsoft and should be applied as soon as possible to affected systems.
Affected products
- Microsoft Windows Hyper-V <UNKNOWN>
Timeline
- 2026-09-08: disclosed