CVE-2026-105009

Incorrect default permissions in Windows Server Update Service allows an authorized attacker to elevate privileges locally.

CVSS v3 7.5 HIGH

7.5^/10

CVSS v3 : HIGH

Vector :

Exploitability : 0.8 / Impact : 6.0

Attack Vector LOCAL

Attack Complexity HIGH

Privileges Required LOW

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope CHANGED

References

Link	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105009	Vendor Advisory Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:microsoft:windows_server_2012:-:::::::*
	cpe:2.3:o:microsoft:windows_server_2012:r2:::::::*
	cpe:2.3:o:microsoft:windows_server_2016::::::::
	cpe:2.3:o:microsoft:windows_server_2019::::::::
	cpe:2.3:o:microsoft:windows_server_2022:::::::x64:*
	cpe:2.3:o:microsoft:windows_server_2025:::::::x64:*

History

26 Oct 2026, 15:29

Type	Values Removed	Values Added
References	~~() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105009 -~~	() https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105009 - Vendor Advisory, Patch
CPE		cpe:2.3:o:microsoft:windows_server_2016:::::::: cpe:2.3:o:microsoft:windows_server_2022:::::::x64:* cpe:2.3:o:microsoft:windows_server_2012:r2:::::::* cpe:2.3:o:microsoft:windows_server_2012:-:::::::* cpe:2.3:o:microsoft:windows_server_2019:::::::: cpe:2.3:o:microsoft:windows_server_2025:::::::x64:*
First Time		Microsoft windows Server 2019 Microsoft Microsoft windows Server 2012 Microsoft windows Server 2016 Microsoft windows Server 2025 Microsoft windows Server 2022

13 Oct 2026, 19:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-13 19:17

Updated : 2026-10-26 15:29

NVD link : CVE-2026-105009

Mitre link : CVE-2026-105009

CVE.ORG link : CVE-2026-105009

JSON object : View

Products Affected

microsoft

windows_server_2016
windows_server_2019
windows_server_2022
windows_server_2025
windows_server_2012

CWE

CWE-276

Incorrect Default Permissions

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"versions": [{"status": "affected", "version": "10.0.26100.0", "lessThan": "10.0.26100.33650", "versionType": "custom"}], "platforms": ["x64-based Systems"]}, {"vendor": "Microsoft", "product": "Windows Server 2025 (Server Core installation)", "versions": [{"status": "affected", "version": "10.0.26100.0", "lessThan": "10.0.26100.33650", "versionType": "custom"}], "platforms": ["x64-based Systems"]}]}], "published": "2026-10-13T19:17:57.277", "references": [{"url": "https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-105009", "tags": ["Vendor Advisory", "Patch"], "source": "secure@microsoft.com"}], "vulnStatus": "Analyzed", "weaknesses": [{"type": "Secondary", "source": "secure@microsoft.com", "description": [{"lang": "en", "value": "CWE-276"}]}], "descriptions": [{"lang": "en", "value": "Incorrect default permissions in Windows Server Update Service allows an authorized attacker to elevate privileges locally."}], "lastModified": "2026-10-26T15:29:00.777", "configurations": 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