CVE-2026-42979
Windows Push Notifications Elevation of Privilege Vulnerability
Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.
INFO
Published Date :
June 9, 2026, 5:17 p.m.
Last Modified :
June 11, 2026, 5 p.m.
Remotely Exploit :
No
Source :
[email protected]
Affected Products
The following products are affected by CVE-2026-42979
vulnerability.
Even if cvefeed.io is aware of the exact versions of the
products
that
are
affected, the information is not represented in the table below.
CVSS Scores
| Score | Version | Severity | Vector | Exploitability Score | Impact Score | Source |
|---|---|---|---|---|---|---|
| CVSS 3.1 | HIGH | f38d906d-7342-40ea-92c1-6c4a2c6478c8 | ||||
| CVSS 3.1 | HIGH | [email protected] |
Public PoC/Exploit Available at Github
CVE-2026-42979 has a 1 public
PoC/Exploit available at Github.
Go to the Public Exploits tab to see the list.
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2026-42979.
| URL | Resource |
|---|---|
| https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42979 | Vendor Advisory |
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2026-42979 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2026-42979
weaknesses.
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
CVE-2026-42978 — Use-After-Free race condition in Windows Push Notifications (WpnService). Patch diff, root cause analysis, TOCTOU lab, Sysmon/ETW detection rules.
PowerShell Batchfile C
Results are limited to the first 15 repositories due to potential performance issues.
The following list is the news that have been mention
CVE-2026-42979 vulnerability anywhere in the article.
-
Zero Day Initiative
The June 2026 Security Update Review
CVE Title Severity CVSS Public Exploited XI Type CVE-2026-41091 Microsoft Defender Elevation of Privilege Vulnerability Important 7.8 Yes Yes 0 EoP CVE-2026-49160 HTTP.sys Denial of Service Vulnerabil ... Read more
The following table lists the changes that have been made to the
CVE-2026-42979 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
-
Initial Analysis by [email protected]
Jun. 11, 2026
Action Type Old Value New Value Added CPE Configuration OR *cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.17763.8880 *cpe:2.3:o:microsoft:windows_10_1809:*:*:*:*:*:*:x86:* versions up to (excluding) 10.0.17763.8880 *cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:arm64:* versions up to (excluding) 10.0.19044.7417 *cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.19044.7417 *cpe:2.3:o:microsoft:windows_10_21h2:*:*:*:*:*:*:x86:* versions up to (excluding) 10.0.19044.7417 *cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:arm64:* versions up to (excluding) 10.0.19045.7417 *cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.19045.7417 *cpe:2.3:o:microsoft:windows_10_22h2:*:*:*:*:*:*:x86:* versions up to (excluding) 10.0.19045.7417 *cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:arm64:* versions up to (excluding) 10.0.22631.7219 *cpe:2.3:o:microsoft:windows_11_23h2:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.22631.7219 *cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:arm64:* versions up to (excluding) 10.0.26100.8655 *cpe:2.3:o:microsoft:windows_11_24h2:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.26100.8655 *cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:arm64:* versions up to (excluding) 10.0.26200.8655 *cpe:2.3:o:microsoft:windows_11_25h2:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.26200.8655 *cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:arm64:* versions up to (excluding) 10.0.28000.2269 *cpe:2.3:o:microsoft:windows_11_26h1:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.28000.2269 *cpe:2.3:o:microsoft:windows_server_2019:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.17763.8880 *cpe:2.3:o:microsoft:windows_server_2022:*:*:*:*:*:*:*:* versions up to (excluding) 10.0.20348.5256 *cpe:2.3:o:microsoft:windows_server_2025:*:*:*:*:*:*:x64:* versions up to (excluding) 10.0.26100.32995 Added Reference Type Microsoft Corporation: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42979 Types: Vendor Advisory -
New CVE Received by [email protected]
Jun. 09, 2026
Action Type Old Value New Value Added Description Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally. Added CVSS V3.1 AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H Added CWE CWE-362 Added CWE CWE-416 Added Reference https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42979