CVE-2026-50340 Windows Runtime Elevation of Privilege Vulnerability
An authorized attacker can elevate privileges via a use-after-free flaw in the Windows Runtime over a network.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-50340?
CVE-2026-50340 is a high-severity use after free vulnerability in Microsoft Windows 11 24h2, published on 14 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Use after free in Windows Runtime allows an authorized attacker to elevate privileges over a network.
Weakness: CWE-416
Which versions are affected by CVE-2026-50340?
It affects 4 products.
Products include Microsoft Windows 11 24h2, Microsoft Windows 11 25h2, Microsoft Windows 11 26h1, Microsoft Windows Server 2025.
How do I fix CVE-2026-50340?
No fix has been published for CVE-2026-50340 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. These bugs are found with fuzzing and sanitisers and avoided by memory-safe languages. More about Use after free.
Is CVE-2026-50340 being exploited?
There is no known exploitation of CVE-2026-50340 in the wild and no public exploit code.
Other vulnerabilities in Microsoft Windows 11 24h2
- CVE-2025-60710 Microsoft Windows Link Following
- CVE-2026-54990 Remote Desktop Client Remote Code Execution Vulnerability
- CVE-2025-50165 Windows Graphics Component Remote Code Execution Vulnerability
- CVE-2025-21311 Windows NTLM V1 Elevation of Privilege Vulnerability
- CVE-2026-108463 Windows SmartScreen Security Feature Bypass Vulnerability
Sources
Also known as GHSA-7g84-83gr-hw7p.