# CVE-2026-80083: Microsoft Windows Hyper-V untrusted pointer dereference

Source: https://junglewise.ai/threats/cve-2026-80083-microsoft-windows-hyper-v-untrusted-pointer-dereference  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-09-08. Updated: 2026-09-26  
License: CC BY 4.0 with a link back

CVE-2026-80083 · Severity: high · CVSS 8.8 · Published 2026-09-08

Windows Hyper-V is a virtualization platform used to run multiple isolated virtual machines on a single server. An authorized local attacker can exploit an untrusted pointer dereference vulnerability to execute arbitrary code with elevated privileges, potentially compromising the underlying host system and all virtual machines running on it.

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-2026-80083 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-80083 being exploited in the wild.

**How severe is CVE-2026-80083?** High severity, with a CVSS score of 8.8, published 8 September 2026.

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

**Is there a fix for CVE-2026-80083?** 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-2026-80083 attacked?** It is attacked with local access, in an operating system.

**Am I affected by CVE-2026-80083?** 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

This vulnerability involves an untrusted pointer dereference in Windows Hyper-V, a virtualization hypervisor component. An authorized local attacker can craft malicious input that causes the hypervisor to dereference an unvalidated pointer, leading to code execution with system-level privileges. The attack requires local access and elevated privileges, but successfully exploiting this flaw allows an attacker to break out of virtualization boundaries or gain control of the host system. A security patch is available from Microsoft.

## Affected products

- Microsoft Windows Hyper-V

## Timeline

- 2026-09-08: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80083](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-80083)

## 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)