Description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Windows 10 Version 1809 | 10.0.17763.0 – < 10.0.17763.8880 | 10.0.17763.8880 |
| Microsoft | Windows 10 Version 21H2 | 10.0.19044.0 – < 10.0.19044.7417 | 10.0.19044.7417 |
| Microsoft | Windows 10 Version 22H2 | 10.0.19045.0 – < 10.0.19045.7417 | 10.0.19045.7417 |
| Microsoft | Windows 11 version 23H2 | 10.0.22631.0 – < 10.0.22631.7219 | 10.0.22631.7219 |
| Microsoft | Windows 11 Version 24H2 | 10.0.26100.0 – < 10.0.26100.8655 | 10.0.26100.8655 |
| Microsoft | Windows 11 Version 25H2 | 10.0.26200.0 – < 10.0.26200.8655 | 10.0.26200.8655 |
| Microsoft | Windows 11 version 26H1 | 10.0.28000.0 – < 10.0.28000.2269 | 10.0.28000.2269 |
| Microsoft | Windows Server 2019 | 10.0.17763.0 – < 10.0.17763.8880 | 10.0.17763.8880 |
| Microsoft | Windows Server 2019 (Server Core installation) | 10.0.17763.0 – < 10.0.17763.8880 | 10.0.17763.8880 |
| Microsoft | Windows Server 2022 | 10.0.20348.0 – < 10.0.20348.5256 | 10.0.20348.5256 |
| Microsoft | Windows Server 2025 | 10.0.26100.0 – < 10.0.26100.32995 | 10.0.26100.32995 |
| Microsoft | Windows Server 2025 (Server Core installation) | 10.0.26100.0 – < 10.0.26100.32995 | 10.0.26100.32995 |
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
GitHub 4 repositories
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SyntaxMethod/CVE-2026-42978-PoC-Research ★ 36 · Sep 11, 2026
CVE-2026-42978 Windows Push Notifications (WpnService) Use-After-Free & Race Condition PoC research, diagnostic scanner, and security audit module for AI Security Tool.
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grizzzer/CVE-2026-42978-PoC-Research ★ 28 · Jun 23, 2026
CVE-2026-42978 — Use-After-Free race condition in Windows Push Notifications (WpnService). Patch diff, root cause analysis, TOCTOU lab, Sysmon/ETW detection rules.
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coactionbrittlemaidenhair51/CVE-2026-42978-PoC-Research ★ 0 · Sep 21, 2026
Exploit and analyze CVE-2026-42978 with a Windows Push Notifications module for AI security, multi-protocol terminal, and autonomous agent suite.
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coactionbrittlemaidenhair51/coactionbrittlemaidenhair51.github.io ★ 0 · Sep 21, 2026
Explore and validate CVE-2026-42978 PoC with an integrated AI security tool, multi-protocol terminal, and autonomous agent suite for Windows Push Notifications.
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
Advisories 3
- WID-SEC-2026-1849 Microsoft Windows: Mehrere Schwachstellen BSI CERT-Bund (WID) · Sep 17, 2026
- NCSC-2026-0181 Kwetsbaarheden verholpen in Microsoft Windows NCSC-NL (Netherlands) · Jun 9, 2026
- MSRC-CVE-2026-42978 Windows Push Notifications Elevation of Privilege Vulnerability Microsoft Security Response Center · Jun 9, 2026
References
- Windows Push Notifications Elevation of Privilege Vulnerability vendor-advisory patch