CVE-2026-97792

Analyzed Analyzed - Analysis Complete

Improper Access Control in Windows Container Isolation FS Filter Driver

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

Improper access control in Windows Container Isolation FS Filter Driver (unionfs.sys) allows an authorized attacker to elevate privileges locally.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-10-13

Last Modified

2026-10-16

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-97792

EUVD

EUVD-2026-100311

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2022	to 10.0.20348.5761 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7652 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7652 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_26h2	to 10.0.26300.9711 (exc)
microsoft	windows_11_26h2	to 10.0.26300.9711 (exc)
microsoft	windows_server_2025	to 10.0.26100.33650 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-732	The product specifies permissions for a security-critical resource in a way that allows that resource to be read or modified by unintended actors.

Attack-Flow Graph

Executive Summary

This vulnerability is an improper access control issue in the Windows Container Isolation FS Filter Driver (unionfs.sys). An authorized attacker can exploit it to elevate their privileges locally on a system.

Impact Analysis

An attacker with local access could exploit this to gain higher privileges, potentially allowing them to take control of the system, install malicious software, or access sensitive data.

Compliance Impact

This vulnerability allows local privilege escalation due to improper access control in Windows Container Isolation FS Filter Driver. Such flaws could potentially lead to unauthorized access to sensitive data or systems, which may impact compliance with standards like GDPR (data protection) or HIPAA (healthcare data privacy) by enabling unauthorized data exposure or system modifications.

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows Container Isolation FS Filter Driver (unionfs.sys). Monitor Microsoft's update guide for patches specific to CVE-2026-97792.

Hi! I’m here to help you understand CVE-2026-97792. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70