CVE-2026-70288
Analyzed Analyzed - Analysis Complete

TOCTOU Race Condition in Windows Win32 Kernel Subsystem

Vulnerability report for CVE-2026-70288, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-10-13

Last updated on: 2026-10-21

Assigner: Microsoft Corporation

Description

Time-of-check time-of-use (toctou) race condition in Windows Win32 Kernel Subsystem allows an authorized attacker to disclose information locally.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-10-13
Last Modified
2026-10-21
Generated
2026-11-08
AI Q&A
2026-10-14
EPSS Evaluated
2026-11-07
NVD
EUVD

Affected Vendors & Products

Showing 26 associated CPEs
Vendor Product Version / Range
microsoft windows_server_2012 r2
microsoft windows_server_2012 *
microsoft windows_10_1607 to 10.0.14393.9612 (exc)
microsoft windows_10_1607 to 10.0.14393.9612 (exc)
microsoft windows_10_1809 to 10.0.17763.9376 (exc)
microsoft windows_10_1809 to 10.0.17763.9376 (exc)
microsoft windows_10_21h2 to 10.0.19044.7807 (exc)
microsoft windows_10_21h2 to 10.0.19044.7807 (exc)
microsoft windows_10_21h2 to 10.0.19044.7807 (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_26h1 to 10.0.28000.3231 (exc)
microsoft windows_11_26h1 to 10.0.28000.3231 (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)
microsoft windows_server_2022 to 10.0.20348.5761 (exc)
microsoft windows_server_2016 to 10.0.14393.9612 (exc)
microsoft windows_server_2019 to 10.0.17763.9376 (exc)
microsoft windows_10_22h2 to 10.0.19045.7807 (exc)
microsoft windows_10_22h2 to 10.0.19045.7807 (exc)
microsoft windows_10_22h2 to 10.0.19045.7807 (exc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-367 The product checks the state of a resource before using that resource, but the resource's state can change between the check and the use in a way that invalidates the results of the check.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This is a time-of-check time-of-use (TOCTOU) race condition in the Windows Win32 Kernel Subsystem. It allows an authorized attacker to exploit timing differences in system operations to disclose information locally.

Detection Guidance

This vulnerability is a local information disclosure issue in the Windows Win32 Kernel Subsystem. Detection typically requires monitoring for unusual local privilege escalation or information access patterns. Use Windows Event Viewer to check for suspicious kernel-level events or unauthorized access attempts. No specific public commands are provided in the available resources.

Impact Analysis

An attacker with local access could exploit this flaw to read sensitive information from the system, potentially leading to unauthorized data exposure or further attacks.

Compliance Impact

This vulnerability allows local information disclosure due to a race condition in the Windows Win32 Kernel Subsystem. It may impact compliance with GDPR by potentially exposing personal data and HIPAA by risking unauthorized access to protected health information if exploited.

Mitigation Strategies

Apply the latest Windows security updates from Microsoft Update as soon as they become available. Enable automatic updates to ensure timely patching. Monitor Microsoft's security advisories for specific guidance on this CVE.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-70288. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart

Security Radar

News mentioning this vulnerability
Loading related security news...