CVE-2026-85369: Microsoft Windows Hyper-V out-of-bounds read privilege escalation

CVE-2026-85369 · Severity: high · CVSS 8.2 · Published 2026-10-13

Windows Hyper-V, Microsoft's virtualization platform used in enterprise data centers, contains an out-of-bounds memory read vulnerability that allows an authorized local user to escalate their privileges to administrator level. An attacker with local access could use this flaw to gain complete control of a system and potentially compromise virtual machines running on it.

Technologies: Microsoft Windows Hyper-V. Vendors: Microsoft.

Quick answers

Is CVE-2026-85369 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-85369 being exploited in the wild.
How severe is CVE-2026-85369?
High severity, with a CVSS score of 8.2, published 13 October 2026.
Which products and versions are affected?
Microsoft Windows Hyper-V.
Is there a fix for CVE-2026-85369?
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-2026-85369 attacked?
It is attacked with local access, in an operating system.
Am I affected by CVE-2026-85369?
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 out-of-bounds read in Windows Hyper-V allows privilege escalation through local attack vector. The vulnerability requires an authenticated attacker with local system access to trigger the out-of-bounds read condition, resulting in elevation to higher privileges.

Affected products

  • Microsoft Windows Hyper-V

Timeline

  • 2026-10-13: disclosed

References

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