CVE-2022-23257

Guest-to-host code execution

Published Apr 15, 2022 · Updated Jan 2, 2025

Remote code execution in Microsoft Hyper-V on affected Windows builds allows guest OS users to execute code on the host. Microsoft's public record does not identify the affected Hyper-V code path or the incorrect operation performed on guest-controlled input. Exploitation requires a low-privileged guest context and crosses the virtualization boundary, allowing code execution in the host context.

CVSS severity8.8
High
EPSS probability0.63%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Remote code execution in Microsoft Hyper-V on affected Windows builds allows guest OS users to execute code on the host. Microsoft's public record does not identify the affected Hyper-V code path or the incorrect operation performed on guest-controlled input. Exploitation requires a low-privileged guest context and crosses the virtualization boundary, allowing code execution in the host context.

The record

CVE
CVE-2022-23257
Published
Apr 15, 2022
Updated
Jan 2, 2025
Vendor
Microsoft
Product
Windows 10 Version 21H1
Classifications
T1611
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 15, 2022CVE publishedPublication date reported by the CVE source.
  2. Jan 2, 2025Record 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.

  1. Affected versionversion=10.0.0 <10.0.19043.1645

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Windows 10 Version 21H1version=10.0.0 <10.0.19043.1645
Microsoft · Windows 11 version 21H2version=10.0.0 <10.0.22000.613
Microsoft · Windows 10 Version 21H2version=10.0.19043.0 <10.0.19044.1645
Microsoft · Windows 11, version 22H2version=10.0.22621.0 <10.0.22621.1413
Microsoft · Windows Server version 20H2version=10.0.0 <10.0.19042.1645
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.643

Published CVSS scores

8.8Microsoft CorporationCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
4.6NIST NVDAV:L/AC:L/Au:N/C:P/I:P/A:P

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

T1611Escape to Host

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

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Your stack

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