CVE-2026-50360 Windows SMB Server Elevation of Privilege Vulnerability
An authorized attacker can elevate privileges over the network due to incorrect authentication implementation in Windows SMB Server.
- 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-2026-50360?
CVE-2026-50360 is a high-severity authentication bypass vulnerability in Microsoft Windows 10 21h2, published on 14 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official description
Incorrect implementation of authentication algorithm in Windows SMB Server allows an authorized attacker to elevate privileges over a network.
Weakness: CWE-303
Which versions are affected by CVE-2026-50360?
It affects 7 products.
Products include Microsoft Windows 10 21h2, Microsoft Windows 10 22h2, Microsoft Windows 11 24h2, Microsoft Windows 11 25h2, Microsoft Windows 11 26h1, Microsoft Windows Server 2022 and 1 more.
How do I fix CVE-2026-50360?
No fix has been published for CVE-2026-50360 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-50360 being exploited?
There is no known exploitation of CVE-2026-50360 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-rc38-f4j6-jq4f.