CVE-2026-56198

Out-of-bounds read in Microsoft Trace Data Helper allows an authorized attacker to elevate privileges locally.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56198	Patch Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:microsoft:windows_11_24h2:::::::arm64:*
	cpe:2.3:o:microsoft:windows_11_24h2:::::::x64:*
	cpe:2.3:o:microsoft:windows_11_25h2:::::::arm64:*
	cpe:2.3:o:microsoft:windows_11_25h2:::::::x64:*
	cpe:2.3:o:microsoft:windows_11_26h1:::::::arm64:*
	cpe:2.3:o:microsoft:windows_11_26h1:::::::x64:*
	cpe:2.3:o:microsoft:windows_server_2025::::::::

History

29 Sep 2026, 16:28

Type	Values Removed	Values Added
CPE		cpe:2.3:o:microsoft:windows_11_26h1:::::::x64:* cpe:2.3:o:microsoft:windows_11_25h2:::::::arm64:* cpe:2.3:o:microsoft:windows_server_2025:::::::: cpe:2.3:o:microsoft:windows_11_24h2:::::::x64:* cpe:2.3:o:microsoft:windows_11_25h2:::::::x64:* cpe:2.3:o:microsoft:windows_11_24h2:::::::arm64:* cpe:2.3:o:microsoft:windows_11_26h1:::::::arm64:*
References	~~() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56198 -~~	() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-56198 - Patch, Vendor Advisory
First Time		Microsoft windows 11 26h1 Microsoft windows Server 2025 Microsoft windows 11 25h2 Microsoft windows 11 24h2 Microsoft

Information

Published : 2026-09-08 18:17

Updated : 2026-09-29 16:28

NVD link : CVE-2026-56198

Mitre link : CVE-2026-56198

CVE.ORG link : CVE-2026-56198

JSON object : View

Products Affected

microsoft

windows_11_25h2
windows_11_24h2
windows_11_26h1
windows_server_2025

CWE

CWE-125

Out-of-bounds Read

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