CVE-2026-83854
Awaiting Analysis Awaiting Analysis - Queue

Improper Access Control in Windows Notification Discloses Local Information

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description
Improper access control in Windows Notification allows an authorized attacker to disclose information 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-2026-83854
EUVD
EUVD-2026-99390

Affected Vendors & Products

Showing 14 associated CPEs
Vendor Product Version / Range
Microsoft Windows 10 Version 1809 10.0.17763.0
Microsoft Windows 10 Version 21H2 10.0.19044.0
Microsoft Windows 10 Version 22H2 10.0.19045.0
Microsoft Windows 11 version 23H2 10.0.22631.0
Microsoft Windows 11 Version 23H2 10.0.22631.0
Microsoft Windows 11 Version 24H2 10.0.26100.0
Microsoft Windows 11 Version 25H2 10.0.26200.0
Microsoft Windows 11 version 26H1 10.0.28000.0
Microsoft Windows 11 Version 26H2 10.0.26300.0
Microsoft Windows Server 2019 10.0.17763.0
Microsoft Windows Server 2019 (Server Core installation) 10.0.17763.0
Microsoft Windows Server 2022 10.0.20348.0
Microsoft Windows Server 2025 10.0.26100.0
Microsoft Windows Server 2025 (Server Core installation) 10.0.26100.0

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-306 The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability is an improper access control issue in Windows Notification that allows an authorized attacker to disclose information locally. It means the system fails to properly restrict access to sensitive data, enabling unauthorized information exposure on affected systems.

Impact Analysis

An attacker with local access could exploit this to read sensitive information from your system. This may include personal data, system configurations, or other confidential details stored on the device.

Compliance Impact

This vulnerability allows local information disclosure due to improper access control in Windows Notification. While not directly tied to GDPR or HIPAA, unauthorized local data exposure could lead to violations if sensitive personal or health data is involved. Organizations must assess whether this flaw could compromise protected data under these regulations.

Mitigation Strategies

Apply the latest Windows security updates from Microsoft Update to patch the improper access control in Windows Notification. Monitor Microsoft's advisory for additional guidance.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-83854. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart