CVE-2024-26254Network attack vector

Denial of service via untrusted pointer dereference

Published Apr 9, 2024 · Updated May 3, 2025

Untrusted pointer dereference in Microsoft Windows VMBus allows remote attackers to interrupt affected systems via network traffic. VMBus dereferences an untrusted pointer, but Microsoft has not disclosed the specific pointer, request path, or resulting failure mode. Exploitation requires no privileges or user interaction and causes an availability-only service interruption on affected Windows builds.

CVSS severity7.5
High
EPSS probability3.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Untrusted pointer dereference in Microsoft Windows VMBus allows remote attackers to interrupt affected systems via network traffic. VMBus dereferences an untrusted pointer, but Microsoft has not disclosed the specific pointer, request path, or resulting failure mode. Exploitation requires no privileges or user interaction and causes an availability-only service interruption on affected Windows builds.

The record

CVE
CVE-2024-26254
Published
Apr 9, 2024
Updated
May 3, 2025
Vendor
Microsoft
Product
Windows Server 2019
Classifications
CWE-822, T1499
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 9, 2024CVE publishedPublication date reported by the CVE source.
  2. May 3, 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=10.0.17763.0 <10.0.17763.5696

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Windows Server 2019version=10.0.17763.0 <10.0.17763.5696
Microsoft · Windows 11 version 21H2version=10.0.0 <10.0.22000.2899
Microsoft · Windows 10 Version 21H2version=10.0.19043.0 <10.0.19044.4291
Microsoft · Windows Server 2022, 23H2 Edition (Server Core installation)version=10.0.25398.0 <10.0.25398.830
Microsoft · Windows 11 Version 22H3version=10.0.22631.0 <10.0.22631.3447
Microsoft · Windows 10 Version 22H2version=10.0.19045.0 <10.0.19045.4291
Microsoft · Windows Server 2019 (Server Core installation)version=10.0.17763.0 <10.0.17763.5696
Microsoft · Windows 11 Version 23H2version=10.0.22631.0 <10.0.22631.3447
Microsoft · Windows 11, version 22H2version=10.0.22621.0 <10.0.22621.3447
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.2402
Microsoft · Windows 10 Version 1809version=10.0.0 <10.0.17763.5696; version=10.0.17763.0 <10.0.17763.5696

Published CVSS scores

7.5MicrosoftCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-822Untrusted Pointer Dereference
T1499Endpoint Denial of Service

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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