CVE-2026-56168 - Vulnerability Details - OpenCVE

Null pointer dereference in Windows SMB Server allows an authorized attacker to deny service over a network.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

No EPSS score available.

Key SSVC decision points have not yet been added.

Vendors	Products
Microsoft	Windows 10 21h2 Windows 10 22h2 Windows 11 24h2 Windows 11 25h2 Windows 11 26h1 Windows Server 2022 Windows Server 2025

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References

Link	Providers
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56168

History

Tue, 14 Jul 2026 17:45:00 +0000

Type	Values Removed	Values Added
Description		Null pointer dereference in Windows SMB Server allows an authorized attacker to deny service over a network.
Title		Windows SMB Server Denial of Service Vulnerability
First Time appeared		Microsoft Microsoft windows 10 21h2 Microsoft windows 10 22h2 Microsoft windows 11 24h2 Microsoft windows 11 25h2 Microsoft windows 11 26h1 Microsoft windows Server 2022 Microsoft windows Server 2025
Weaknesses		CWE-476
CPEs		cpe:2.3:o:microsoft:windows_10_21H2:::::::x86:* cpe:2.3:o:microsoft:windows_10_22H2:::::::x64:* cpe:2.3:o:microsoft:windows_11_24H2:::::::arm64:* cpe:2.3:o:microsoft:windows_11_25H2:::::::arm64:* cpe:2.3:o:microsoft:windows_11_26H1:::::::x64:* cpe:2.3:o:microsoft:windows_server_2022:::::::: cpe:2.3:o:microsoft:windows_server_2025::::::::
Vendors & Products		Microsoft Microsoft windows 10 21h2 Microsoft windows 10 22h2 Microsoft windows 11 24h2 Microsoft windows 11 25h2 Microsoft windows 11 26h1 Microsoft windows Server 2022 Microsoft windows Server 2025
References		https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56168
Metrics		cvssV3_1 `{'score': 6.5, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C'}`

MITRE

Status: PUBLISHED

Assigner: microsoft

Published: 2026-07-14T17:09:15.345Z

Updated: 2026-07-14T18:44:26.035Z

Reserved: 2026-06-19T13:53:31.989Z

Link: CVE-2026-56168

Vulnrichment

No data.

NVD

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Redhat

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OpenCVE Enrichment

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