CVE-2024-49117

Guest-to-host code execution via wrong status code

Published Dec 10, 2024 · Updated Jun 9, 2026

Windows Hyper-V in affected Windows 11 and Windows Server builds allows guest OS users to execute code on the host. The Hyper-V implementation returns an incorrect status code, but Microsoft has not disclosed the responsible routine, input, or control-flow error. Low-privileged code in a guest is required; successful exploitation crosses the virtual-machine boundary and executes code in the host context.

CVSS severity8.8
High
EPSS probability1.03%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Windows Hyper-V in affected Windows 11 and Windows Server builds allows guest OS users to execute code on the host. The Hyper-V implementation returns an incorrect status code, but Microsoft has not disclosed the responsible routine, input, or control-flow error. Low-privileged code in a guest is required; successful exploitation crosses the virtual-machine boundary and executes code in the host context.

The record

CVE
CVE-2024-49117
Published
Dec 10, 2024
Updated
Jun 9, 2026
Vendor
Microsoft
Product
Windows Server 2025 (Server Core installation)
Classifications
CWE-393, T1068
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Dec 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Jun 9, 2026Record 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.

  1. Affected versionversion=10.0.26100.0 <10.0.26100.2605

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Microsoft · Windows Server 2025 (Server Core installation)version=10.0.26100.0 <10.0.26100.2605
Microsoft · Windows 11, version 24H2version=10.0.26100.0 <10.0.26100.2605
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)version=10.0.25398.0 <10.0.25398.1308
Microsoft · Windows 11 Version 22H3version=10.0.22631.0 <10.0.22631.4602
Microsoft · Windows 11 Version 23H2version=10.0.22631.0 <10.0.22631.4602
Microsoft · Windows 11, version 22H2version=10.0.22621.0 <10.0.22621.4602
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.2966
Microsoft · Windows Server 2025version=10.0.26100.0 <10.0.26100.2605

Published CVSS scores

8.8MicrosoftCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

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

CWE-393Return of Wrong Status Code
T1068Exploitation for Privilege Escalation

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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