CVE-2026-50487 Windows DNS Client Elevation of Privilege Vulnerability
An unauthorized attacker can elevate privileges over the network via a use-after-free flaw in the Windows DNS Client.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-50487?
CVE-2026-50487 is a high-severity use after free vulnerability in Microsoft Windows 11 24h2, published on 14 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Use after free in Microsoft Windows DNS allows an unauthorized attacker to elevate privileges over a network.
Weakness: CWE-416
Which versions are affected by CVE-2026-50487?
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-2026-50487?
No fix has been published for CVE-2026-50487 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-2026-50487 being exploited?
There is no known exploitation of CVE-2026-50487 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-5fc8-2988-xmjx.