Sensitive-information disclosure to local low-privileged users
Published Nov 14, 2023 · Updated Oct 8, 2025
Information disclosure in Windows Hyper-V on affected Windows 11 and Server 2022 builds allows local users to read sensitive host data. Microsoft identifies improper input validation but has not disclosed the affected Hyper-V locus, the untrusted input, or the invalid operation. Local low-privileged access is required; exploitation affects confidentiality without reported data modification or service interruption.
Summary
What happened
Information disclosure in Windows Hyper-V on affected Windows 11 and Server 2022 builds allows local users to read sensitive host data. Microsoft identifies improper input validation but has not disclosed the affected Hyper-V locus, the untrusted input, or the invalid operation. Local low-privileged access is required; exploitation affects confidentiality without reported data modification or service interruption.
The record
- CVE
- CVE-2023-36406
- Published
- Nov 14, 2023
- Updated
- Oct 8, 2025
- Vendor
- Microsoft
- Product
- Windows 11 version 21H2
- Classifications
- CWE-20
- Attack vector
- local
- Privileges
- authenticated
Timeline
How it unfolded
- Nov 14, 2023CVE publishedPublication date reported by the CVE source.
- Oct 8, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=10.0.0 <10.0.22000.2600
What conditions does exploitation require?
What is affected?
Published CVSS scores
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.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
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Technologies
Your stack
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Your stack
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