CVE-2026-26172 Windows Push Notifications Elevation of Privilege Vulnerability
An authorized local attacker can exploit a race condition in Windows Push Notifications to elevate privileges.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-26172?
CVE-2026-26172 is a high-severity vulnerability in Microsoft Windows 10 21h2, published on 14 Apr 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Concurrent execution using shared resource with improper synchronization ('race condition') in Windows Push Notifications allows an authorized attacker to elevate privileges locally.
Which versions are affected by CVE-2026-26172?
It affects 9 products.
Products include Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 23h2, Microsoft Windows 11 24h2, Microsoft Windows 11 25h2, Microsoft Windows 11 26h1 and 3 more.
How do I fix CVE-2026-26172?
No fix has been published for CVE-2026-26172 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-26172 being exploited?
There is no known exploitation of CVE-2026-26172 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 10 21h2
- CVE-2025-21333 Microsoft Windows Hyper-V NT Kernel Integration VSP Heap-based Buffer Overflow
- CVE-2025-21334 Microsoft Windows Hyper-V NT Kernel Integration VSP Use-After-Free
- CVE-2025-21335 Microsoft Windows Hyper-V NT Kernel Integration VSP Use-After-Free
- CVE-2026-42904 Windows TCP/IP Elevation of Privilege Vulnerability
- CVE-2026-105733 Windows Hyper-V Remote Code Execution Vulnerability
Sources
Also known as GHSA-cq7p-pgp3-4rj8.