CVE-2026-42977

Analyzed Analyzed - Analysis Complete

Windows Push Notifications Race Condition Privilege Escalation

Publication date: 2026-06-09

Last updated on: 2026-06-10

Assigner: Microsoft Corporation

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-06-09

Last Modified

2026-06-10

Generated

2026-06-30

AI Q&A

2026-06-09

EPSS Evaluated

2026-06-28

NVD

CVE-2026-42977

EUVD

EUVD-2026-35739

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_10_1809	to 10.0.17763.8880 (exc)
microsoft	windows_10_1809	to 10.0.17763.8880 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7417 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7417 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7417 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7417 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7417 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7417 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7219 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7219 (exc)
microsoft	windows_11_24h2	to 10.0.26100.8655 (exc)
microsoft	windows_11_24h2	to 10.0.26100.8655 (exc)
microsoft	windows_11_25h2	to 10.0.26200.8655 (exc)
microsoft	windows_11_25h2	to 10.0.26200.8655 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2269 (exc)
microsoft	windows_11_26h1	to 10.0.28000.2269 (exc)
microsoft	windows_server_2019	to 10.0.17763.8880 (exc)
microsoft	windows_server_2022	to 10.0.20348.5256 (exc)
microsoft	windows_server_2025	to 10.0.26100.32995 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-362	The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

Attack-Flow Graph

Executive Summary

This vulnerability is a race condition in Windows Push Notifications caused by concurrent execution using a shared resource without proper synchronization.

It allows an authorized attacker to elevate their privileges locally on the affected system.

Impact Analysis

An attacker who exploits this vulnerability can gain higher privileges on the affected Windows system.

This elevation of privilege can lead to unauthorized access to sensitive data, modification of system settings, or execution of malicious code with elevated rights.

Mitigation Strategies

To mitigate this vulnerability, it is important to apply any security updates or patches provided by Microsoft for Windows Push Notifications as soon as they become available.

Since the vulnerability involves a race condition allowing local privilege escalation, limiting local user access and ensuring that only authorized users have access to affected systems can help reduce risk.

Compliance Impact

This vulnerability allows an authorized attacker to elevate privileges locally through a race condition in Windows Push Notifications.

Elevation of privilege vulnerabilities can potentially impact compliance with standards and regulations such as GDPR and HIPAA by increasing the risk of unauthorized access to sensitive data or systems.

However, no specific information is provided about direct effects on compliance with these regulations in the available resources.

Hi! I’m here to help you understand CVE-2026-42977. Ask me anything about the vulnerability, its impact, or mitigation strategies.

0/70