# CVE-2026-105733: Microsoft Windows Hyper-V improper access control

Source: https://junglewise.ai/threats/cve-2026-105733-improper-access-control-in-windows-hyper-v-allows-an-authorized  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-105733 · Severity: high · CVSS 8.8 · Published 2026-10-13

Windows Hyper-V, a virtualization platform that enables businesses to run multiple virtual machines on a single server, contains an access control flaw that allows an authorized attacker to execute arbitrary code with local system privileges. This vulnerability could allow an authenticated user to compromise the host system and potentially gain control over all virtual machines running on that infrastructure.

Technologies: [Microsoft Windows Hyper-V](https://junglewise.ai/threats/technologies/windows-hyper-v). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-105733 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-105733 being exploited in the wild.

**How severe is CVE-2026-105733?** High severity, with a CVSS score of 8.8, published 13 October 2026.

**Which products and versions are affected?** Microsoft Windows Hyper-V.

**Is there a fix for CVE-2026-105733?** 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-2026-105733 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-105733?** Check whether you run Microsoft Windows Hyper-V. 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

An improper access control vulnerability in Windows Hyper-V allows an authorized local attacker to execute code with elevated privileges. The vulnerability requires prior authentication or system access. Successful exploitation results in arbitrary code execution on the hypervisor host.

## Affected products

- Microsoft Windows Hyper-V

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105733](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105733)

## Related threats

- [Microsoft Windows Hyper-V null pointer dereference DoS](https://junglewise.ai/threats/cve-2026-96965-null-pointer-dereference-in-windows-hyper-v-allows-an-authorized)
- [Microsoft Windows Hyper-V certificate validation bypass](https://junglewise.ai/threats/cve-2026-95910-improper-certificate-validation-in-windows-hyper-v-allows-an)
- [Microsoft Windows Hyper-V uninitialized resource privilege escalation](https://junglewise.ai/threats/cve-2026-119960-use-of-uninitialized-resource-in-windows-hyper-v-allows-an)
- [Windows Hyper-V access control spoofing vulnerability](https://junglewise.ai/threats/cve-2026-119959-improper-access-control-in-windows-hyper-v-allows-an-authorized)
- [Windows Hyper-V use-after-free privilege elevation](https://junglewise.ai/threats/cve-2026-119826-use-after-free-in-windows-hyper-v-allows-an-authorized-attacker)