Use-after-free in Windows and Windows Server - CVE-2026-50694
Published: July 17, 2026
Vulnerability identifier: #VU137947
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-50694
CWE-ID: CWE-416
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: Microsoft
Affected software:
Windows
Windows Server
Windows
Windows Server
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to use-after-free in Windows Secure Socket Tunneling Protocol (SSTP) when handling SSTP packets. A remote attacker can send a specially crafted malicious SSTP packet to execute arbitrary code.
How to mitigate CVE-2026-50694
Install security update from vendor's website.