CVE-2026-72971

Improper link resolution before file access ('link following') in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to perform tampering locally.

CVSS v3 5.5 MEDIUM

5.5^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 1.8 / Impact : 3.6

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact HIGH

Availability Impact NONE

Scope UNCHANGED

References

Link	Resource
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-72971	Vendor Advisory Patch

Configurations

Configuration 1 (hide)

OR	cpe:2.3:o:microsoft:windows_11_26h1:::::::arm64:*
	cpe:2.3:o:microsoft:windows_11_26h1:::::::x64:*

History

23 Oct 2026, 19:10

Type	Values Removed	Values Added
Summary		(es) Resolución de enlaces incorrecta antes del acceso a archivos (’seguimiento de enlaces’) en el controlador de filtro del sistema de archivos de aislamiento de contenedores de Windows (unionfs.sys) permite a un atacante autorizado realizar manipulaciones localmente.

Information

Published : 2026-08-11 17:19

Updated : 2026-10-24 15:10

NVD link : CVE-2026-72971

Mitre link : CVE-2026-72971

CVE.ORG link : CVE-2026-72971

JSON object : View

Products Affected

microsoft

windows_11_26h1

CWE

CWE-59

Improper Link Resolution Before File Access ('Link Following')

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