Local privilege escalation via out-of-bounds read
Published Oct 13, 2026 · Updated Oct 13, 2026
An out-of-bounds read in Microsoft Windows Hyper-V allows local users with existing authorization to elevate privileges. The public record does not identify the affected routine, input, or incorrect bounds operation within Hyper-V. Exploitation requires existing high privileges; the record does not establish the resulting privilege level or a guest-to-host escape.
Summary
What happened
An out-of-bounds read in Microsoft Windows Hyper-V allows local users with existing authorization to elevate privileges. The public record does not identify the affected routine, input, or incorrect bounds operation within Hyper-V. Exploitation requires existing high privileges; the record does not establish the resulting privilege level or a guest-to-host escape.
The record
- CVE
- CVE-2026-85369
- Published
- Oct 13, 2026
- Updated
- Oct 13, 2026
- Vendor
- Microsoft Corporation
- Product
- Windows Server 2025 (Server Core installation)
- Classifications
- CWE-125, T1068
- Attack vector
- local
- Privileges
- admin
Timeline
How it unfolded
- Oct 13, 2026CVE publishedPublication date reported by the CVE source.
- Oct 13, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.26100.0 <10.0.26100.33650
What conditions does exploitation require?
What is affected?
Published CVSS scores
No CVSS assessment is available in this record.
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Activity data is delayed. The latest report is Sep 28, 2026.
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Get started to see how Hinoki identifies affected software and validates exploitability in your environment.
Get started